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248907980 = 22519655021
BaseRepresentation
bin11101101011000…
…00100011001100
3122100100211120002
432311200203030
51002210023410
640410543432
76111453146
oct1665404314
9570324502
10248907980
11118558282
126b437b78
133c74c639
14250b3c96
1516cba7a5
hexed608cc

248907980 has 24 divisors (see below), whose sum is σ = 550218480. Its totient is φ = 94322880.

The previous prime is 248907977. The next prime is 248908013. The reversal of 248907980 is 89709842.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 327131 + ... + 327890.

It is an arithmetic number, because the mean of its divisors is an integer number (22925770).

Almost surely, 2248907980 is an apocalyptic number.

248907980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

248907980 is an abundant number, since it is smaller than the sum of its proper divisors (301310500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

248907980 is a wasteful number, since it uses less digits than its factorization.

248907980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655049 (or 655047 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 248907980 is about 15776.8178033468. The cubic root of 248907980 is about 629.0419468489.

The spelling of 248907980 in words is "two hundred forty-eight million, nine hundred seven thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 655021 1310042 2620084 3275105 6550210 12445399 13100420 24890798 49781596 62226995 124453990 248907980