861053652 has 30 divisors (see below), whose sum is σ = 2250965178. Its totient is φ = 287017776.

The previous prime is 861053651. The next prime is 861053659. The reversal of 861053652 is 256350168.

861053652 is a `hidden beast` number, since 8 + 610 + 5 + 36 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 532501776 + 328551876 = 23076^2 + 18126^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861053651) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1328463 + ... + 1329110.

Almost surely, 2^861053652 is an apocalyptic number.

It is an amenable number.

861053652 is an abundant number, since it is smaller than the sum of its proper divisors (1389911526).

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

861053652 is a wasteful number, since it uses less digits than its factorization.

861053652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657589 (or 2657578 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 861053652 is about 29343.7157156349. The cubic root of 861053652 is about 951.3567509875.

The spelling of 861053652 in words is "eight hundred sixty-one million, fifty-three thousand, six hundred fifty-two".