861052372 has 12 divisors (see below), whose sum is σ = 1532381760. Its totient is φ = 423229016.

The previous prime is 861052351. The next prime is 861052391. The reversal of 861052372 is 273250168.

It is a happy number.

It is a super-2 number, since 2×861052372² = 1482822374653652768, which contains 22 as substring.

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, 1824028 + ... + 1824499.

It is an arithmetic number, because the mean of its divisors is an integer number (127698480).

Almost surely, 2^861052372 is an apocalyptic number.

It is an amenable number.

861052372 is a deficient number, since it is larger than the sum of its proper divisors (671329388).

861052372 is a wasteful number, since it uses less digits than its factorization.

861052372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648590 (or 3648588 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 861052372 is about 29343.6939051647. The cubic root of 861052372 is about 951.3562795739.

The spelling of 861052372 in words is "eight hundred sixty-one million, fifty-two thousand, three hundred seventy-two".