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3781283985 = 3351031931409
BaseRepresentation
bin1110000101100001…
…1101000010010001
3100202112011010111000
43201120131002101
530221002041420
61423114012213
7162463245363
oct34130350221
910675133430
103781283985
111670488696
12896417069
1348351355b
1427c29cd33
15171e70690
hexe161d091

3781283985 has 64 divisors (see below), whose sum is σ = 6827558400. Its totient is φ = 1985347584.

The previous prime is 3781283983. The next prime is 3781284029. The reversal of 3781283985 is 5893821873.

It is not a de Polignac number, because 3781283985 - 21 = 3781283983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3781283983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2682961 + ... + 2684369.

It is an arithmetic number, because the mean of its divisors is an integer number (106680600).

Almost surely, 23781283985 is an apocalyptic number.

It is an amenable number.

3781283985 is a deficient number, since it is larger than the sum of its proper divisors (3046274415).

3781283985 is a wasteful number, since it uses less digits than its factorization.

3781283985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1713 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 3781283985 is about 61492.1457179695. The cubic root of 3781283985 is about 1557.9245884864.

The spelling of 3781283985 in words is "three billion, seven hundred eighty-one million, two hundred eighty-three thousand, nine hundred eighty-five".

Divisors: 1 3 5 9 15 27 45 103 135 193 309 515 579 927 965 1409 1545 1737 2781 2895 4227 4635 5211 7045 8685 12681 13905 19879 21135 26055 38043 59637 63405 99395 145127 178911 190215 271937 298185 435381 536733 725635 815811 894555 1306143 1359685 2176905 2447433 2683665 3918429 4079055 6530715 7342299 12237165 19592145 28009511 36711495 84028533 140047555 252085599 420142665 756256797 1260427995 3781283985