3129690438 has 48 divisors (see below), whose sum is σ = 7799120160. Its totient is φ = 888496128.

The previous prime is 3129690419. The next prime is 3129690479. The reversal of 3129690438 is 8340969213.

It is a happy number.

3129690438 is a `hidden beast` number, since 3 + 129 + 6 + 90 + 438 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3129690393 and 3129690402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59323 + ... + 98886.

It is an arithmetic number, because the mean of its divisors is an integer number (162481670).

Almost surely, 2^3129690438 is an apocalyptic number.

3129690438 is an abundant number, since it is smaller than the sum of its proper divisors (4669429722).

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

3129690438 is a wasteful number, since it uses less digits than its factorization.

3129690438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158381 (or 158378 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 3129690438 is about 55943.6362600788. The cubic root of 3129690438 is about 1462.7399660594.

The spelling of 3129690438 in words is "three billion, one hundred twenty-nine million, six hundred ninety thousand, four hundred thirty-eight".