394031973524 has 48 divisors (see below), whose sum is σ = 808553843328. Its totient is φ = 164501221248.

The previous prime is 394031973521. The next prime is 394031973547. The reversal of 394031973524 is 425379130493.

It is a super-2 number, since 2×394031973524² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394031973521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10394 + ... + 887790.

It is an arithmetic number, because the mean of its divisors is an integer number (16844871736).

Almost surely, 2^394031973524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394031973524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404276921664).

394031973524 is an abundant number, since it is smaller than the sum of its proper divisors (414521869804).

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

394031973524 is a wasteful number, since it uses less digits than its factorization.

394031973524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877824 (or 877822 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 394031973524 in words is "three hundred ninety-four billion, thirty-one million, nine hundred seventy-three thousand, five hundred twenty-four".