531378888 has 16 divisors (see below), whose sum is σ = 1328447280. Its totient is φ = 177126288.

The previous prime is 531378853. The next prime is 531378889. The reversal of 531378888 is 888873135.

It is a super-2 number, since 2×531378888² = 564727045224233088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531378888.

It is not an unprimeable number, because it can be changed into a prime (531378889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11070370 + ... + 11070417.

It is an arithmetic number, because the mean of its divisors is an integer number (83027955).

Almost surely, 2^531378888 is an apocalyptic number.

It is an amenable number.

531378888 is an abundant number, since it is smaller than the sum of its proper divisors (797068392).

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

531378888 is a wasteful number, since it uses less digits than its factorization.

531378888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22140796 (or 22140792 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 531378888 is about 23051.6569469529. The cubic root of 531378888 is about 809.9684426053.

The spelling of 531378888 in words is "five hundred thirty-one million, three hundred seventy-eight thousand, eight hundred eighty-eight".