870969990 has 32 divisors (see below), whose sum is σ = 2280358656. Its totient is φ = 211144160.

The previous prime is 870969989. The next prime is 870970033. The reversal of 870969990 is 99969078.

It is a self number, because there is not a number n which added to its sum of digits gives 870969990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319322 + ... + 1319981.

It is an arithmetic number, because the mean of its divisors is an integer number (71261208).

Almost surely, 2^870969990 is an apocalyptic number.

870969990 is an abundant number, since it is smaller than the sum of its proper divisors (1409388666).

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

870969990 is a wasteful number, since it uses less digits than its factorization.

870969990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639324.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 870969990 is about 29512.2006973387. The cubic root of 870969990 is about 954.9949251852.

The spelling of 870969990 in words is "eight hundred seventy million, nine hundred sixty-nine thousand, nine hundred ninety".