861013588 has 6 divisors (see below), whose sum is σ = 1506773786. Its totient is φ = 430506792.

The previous prime is 861013577. The next prime is 861013589. The reversal of 861013588 is 885310168.

It can be written as a sum of positive squares in only one way, i.e., 536941584 + 324072004 = 23172^2 + 18002^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 861013588.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861013589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107626695 + ... + 107626702.

Almost surely, 2^861013588 is an apocalyptic number.

It is an amenable number.

861013588 is a deficient number, since it is larger than the sum of its proper divisors (645760198).

861013588 is a wasteful number, since it uses less digits than its factorization.

861013588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215253401 (or 215253399 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 861013588 is about 29343.0330402295. The cubic root of 861013588 is about 951.3419955199.

The spelling of 861013588 in words is "eight hundred sixty-one million, thirteen thousand, five hundred eighty-eight".