861888532 has 12 divisors (see below), whose sum is σ = 1508701600. Its totient is φ = 430830936.

The previous prime is 861888529. The next prime is 861888551. The reversal of 861888532 is 235888168.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9888 + ... + 42679.

Almost surely, 2^861888532 is an apocalyptic number.

It is an amenable number.

861888532 is a deficient number, since it is larger than the sum of its proper divisors (646813068).

861888532 is a wasteful number, since it uses less digits than its factorization.

861888532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56670 (or 56668 counting only the distinct ones).

The product of its digits is 737280, while the sum is 49.

The square root of 861888532 is about 29357.9381428601. The cubic root of 861888532 is about 951.6641310415.

The spelling of 861888532 in words is "eight hundred sixty-one million, eight hundred eighty-eight thousand, five hundred thirty-two".