531897894 has 64 divisors (see below), whose sum is σ = 1357344000. Its totient is φ = 152694720.

The previous prime is 531897889. The next prime is 531897923. The reversal of 531897894 is 498798135.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 531897894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12279 + ... + 34850.

It is an arithmetic number, because the mean of its divisors is an integer number (21208500).

Almost surely, 2^531897894 is an apocalyptic number.

531897894 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

531897894 is an abundant number, since it is smaller than the sum of its proper divisors (825446106).

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

531897894 is a wasteful number, since it uses less digits than its factorization.

531897894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47170 (or 47164 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 531897894 is about 23062.9116548627. The cubic root of 531897894 is about 810.2320597103.

The spelling of 531897894 in words is "five hundred thirty-one million, eight hundred ninety-seven thousand, eight hundred ninety-four".