394729638072 has 64 divisors (see below), whose sum is σ = 1230326150400. Its totient is φ = 102527178240.

The previous prime is 394729638059. The next prime is 394729638103. The reversal of 394729638072 is 270836927493.

It is a super-2 number, since 2×394729638072² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394729637997 and 394729638015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106797297 + ... + 106800992.

It is an arithmetic number, because the mean of its divisors is an integer number (19223846100).

Almost surely, 2^394729638072 is an apocalyptic number.

It is an amenable number.

394729638072 is an abundant number, since it is smaller than the sum of its proper divisors (835596512328).

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

394729638072 is a wasteful number, since it uses less digits than its factorization.

394729638072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213598316 (or 213598312 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 394729638072 in words is "three hundred ninety-four billion, seven hundred twenty-nine million, six hundred thirty-eight thousand, seventy-two".