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372139287 = 31323414871
BaseRepresentation
bin10110001011100…
…110010100010111
3221221020122010120
4112023212110113
51230231424122
6100532123023
712136063122
oct2613462427
9857218116
10372139287
11181076833
12a4766473
135c138280
14375d13b9
1522a0d75c
hex162e6517

372139287 has 16 divisors (see below), whose sum is σ = 557587968. Its totient is φ = 219051360.

The previous prime is 372139253. The next prime is 372139291. The reversal of 372139287 is 782931273.

It is not a de Polignac number, because 372139287 - 215 = 372106519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (372139387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206539 + ... + 208332.

It is an arithmetic number, because the mean of its divisors is an integer number (34849248).

Almost surely, 2372139287 is an apocalyptic number.

372139287 is a deficient number, since it is larger than the sum of its proper divisors (185448681).

372139287 is a wasteful number, since it uses less digits than its factorization.

372139287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414910.

The product of its digits is 127008, while the sum is 42.

The square root of 372139287 is about 19290.9120313167. The cubic root of 372139287 is about 719.2863859273.

The spelling of 372139287 in words is "three hundred seventy-two million, one hundred thirty-nine thousand, two hundred eighty-seven".

Divisors: 1 3 13 23 39 69 299 897 414871 1244613 5393323 9542033 16179969 28626099 124046429 372139287