865655490 has 32 divisors (see below), whose sum is σ = 2374369920. Its totient is φ = 197864064.

The previous prime is 865655471. The next prime is 865655491. The reversal of 865655490 is 94556568.

865655490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (865655491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060875 + ... + 2061294.

It is an arithmetic number, because the mean of its divisors is an integer number (74199060).

Almost surely, 2^865655490 is an apocalyptic number.

865655490 is an abundant number, since it is smaller than the sum of its proper divisors (1508714430).

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

865655490 is a wasteful number, since it uses less digits than its factorization.

865655490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122186.

The product of its (nonzero) digits is 1296000, while the sum is 48.

The square root of 865655490 is about 29422.0238936753. The cubic root of 865655490 is about 953.0485594022.

It can be divided in two parts, 8656 and 55490, that added together give a palindrome (64146).

The spelling of 865655490 in words is "eight hundred sixty-five million, six hundred fifty-five thousand, four hundred ninety".