861255330 has 64 divisors (see below), whose sum is σ = 2297852928. Its totient is φ = 205159680.

The previous prime is 861255301. The next prime is 861255331. The reversal of 861255330 is 33552168.

It is a junction number, because it is equal to n+sod(n) for n = 861255291 and 861255300.

It is not an unprimeable number, because it can be changed into a prime (861255331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23529 + ... + 47708.

It is an arithmetic number, because the mean of its divisors is an integer number (35903952).

Almost surely, 2^861255330 is an apocalyptic number.

861255330 is an abundant number, since it is smaller than the sum of its proper divisors (1436597598).

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

861255330 is a wasteful number, since it uses less digits than its factorization.

861255330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71291.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 861255330 is about 29347.1519912921. The cubic root of 861255330 is about 951.4310215236.

The spelling of 861255330 in words is "eight hundred sixty-one million, two hundred fifty-five thousand, three hundred thirty".