626139938 has 16 divisors (see below), whose sum is σ = 956638080. Its totient is φ = 307306896.

The previous prime is 626139901. The next prime is 626139949. The reversal of 626139938 is 839931626.

It is a junction number, because it is equal to n+sod(n) for n = 626139892 and 626139901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15881 + ... + 38787.

It is an arithmetic number, because the mean of its divisors is an integer number (59789880).

Almost surely, 2^626139938 is an apocalyptic number.

626139938 is a deficient number, since it is larger than the sum of its proper divisors (330498142).

626139938 is a wasteful number, since it uses less digits than its factorization.

626139938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23161.

The product of its digits is 419904, while the sum is 47.

The square root of 626139938 is about 25022.7883738004. The cubic root of 626139938 is about 855.5074620505.

The spelling of 626139938 in words is "six hundred twenty-six million, one hundred thirty-nine thousand, nine hundred thirty-eight".