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1138620 = 223572711
BaseRepresentation
bin100010101111110111100
32010211220010
410111332330
5242413440
640223220
712451410
oct4257674
92124803
101138620
1170850a
1246ab10
1330b352
14218d40
15177580
hex115fbc

1138620 has 48 divisors (see below), whose sum is σ = 3644928. Its totient is φ = 260160.

The previous prime is 1138591. The next prime is 1138637. The reversal of 1138620 is 268311.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 936 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (75936).

21138620 is an apocalyptic number.

1138620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138620 is an abundant number, since it is smaller than the sum of its proper divisors (2506308).

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

1138620 is a wasteful number, since it uses less digits than its factorization.

1138620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1138620 is about 1067.0613853008. The cubic root of 1138620 is about 104.4222233632.

The spelling of 1138620 in words is "one million, one hundred thirty-eight thousand, six hundred twenty".

Divisors: 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 210 420 2711 5422 8133 10844 13555 16266 18977 27110 32532 37954 40665 54220 56931 75908 81330 94885 113862 162660 189770 227724 284655 379540 569310 1138620