626157138 has 8 divisors (see below), whose sum is σ = 1252314288. Its totient is φ = 208719044.

The previous prime is 626157109. The next prime is 626157139. The reversal of 626157138 is 831751626.

It is a sphenic number, since it is the product of 3 distinct primes.

626157138 is an admirable number.

It is a super-2 number, since 2×626157138² = 784145522936702088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 626157096 and 626157105.

It is not an unprimeable number, because it can be changed into a prime (626157139) 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 3 ways as a sum of consecutive naturals, for example, 52179756 + ... + 52179767.

It is an arithmetic number, because the mean of its divisors is an integer number (156539286).

Almost surely, 2^626157138 is an apocalyptic number.

626157138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

626157138 is a wasteful number, since it uses less digits than its factorization.

626157138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104359528.

The product of its digits is 60480, while the sum is 39.

The square root of 626157138 is about 25023.1320581577. The cubic root of 626157138 is about 855.5152955462.

The spelling of 626157138 in words is "six hundred twenty-six million, one hundred fifty-seven thousand, one hundred thirty-eight".