531994788 has 36 divisors (see below), whose sum is σ = 1448209308. Its totient is φ = 163690560.

The previous prime is 531994781. The next prime is 531994817. The reversal of 531994788 is 887499135.

It can be written as a sum of positive squares in 2 ways, for example, as 293848164 + 238146624 = 17142^2 + 15432^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (531994781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 567903 + ... + 568838.

Almost surely, 2^531994788 is an apocalyptic number.

It is an amenable number.

531994788 is an abundant number, since it is smaller than the sum of its proper divisors (916214520).

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

531994788 is a wasteful number, since it uses less digits than its factorization.

531994788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136764 (or 1136759 counting only the distinct ones).

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

The square root of 531994788 is about 23065.0122046358. The cubic root of 531994788 is about 810.2812557806.

The spelling of 531994788 in words is "five hundred thirty-one million, nine hundred ninety-four thousand, seven hundred eighty-eight".