531872394 has 32 divisors (see below), whose sum is σ = 1103069184. Its totient is φ = 170789040.

The previous prime is 531872347. The next prime is 531872417. The reversal of 531872394 is 493278135.

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, 35067 + ... + 47889.

It is an arithmetic number, because the mean of its divisors is an integer number (34470912).

Almost surely, 2^531872394 is an apocalyptic number.

531872394 is an abundant number, since it is smaller than the sum of its proper divisors (571196790).

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

531872394 is a wasteful number, since it uses less digits than its factorization.

531872394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13082.

The product of its digits is 181440, while the sum is 42.

The square root of 531872394 is about 23062.3588125760. The cubic root of 531872394 is about 810.2191115813.

The spelling of 531872394 in words is "five hundred thirty-one million, eight hundred seventy-two thousand, three hundred ninety-four".