865620052 has 24 divisors (see below), whose sum is σ = 1671122880. Its totient is φ = 389040960.

The previous prime is 865620029. The next prime is 865620083. The reversal of 865620052 is 250026568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106608 + ... + 114439.

It is an arithmetic number, because the mean of its divisors is an integer number (69630120).

Almost surely, 2^865620052 is an apocalyptic number.

It is an amenable number.

865620052 is a deficient number, since it is larger than the sum of its proper divisors (805502828).

865620052 is a wasteful number, since it uses less digits than its factorization.

865620052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221151 (or 221149 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 865620052 is about 29421.4216515790. The cubic root of 865620052 is about 953.0355539991.

The spelling of 865620052 in words is "eight hundred sixty-five million, six hundred twenty thousand, fifty-two".