870639164 has 12 divisors (see below), whose sum is σ = 1549443000. Its totient is φ = 427941168.

The previous prime is 870639137. The next prime is 870639169. The reversal of 870639164 is 461936078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870639169) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1844339 + ... + 1844810.

It is an arithmetic number, because the mean of its divisors is an integer number (129120250).

Almost surely, 2^870639164 is an apocalyptic number.

It is an amenable number.

870639164 is a deficient number, since it is larger than the sum of its proper divisors (678803836).

870639164 is a wasteful number, since it uses less digits than its factorization.

870639164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689212 (or 3689210 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 870639164 is about 29506.5952627544. The cubic root of 870639164 is about 954.8739959666.

The spelling of 870639164 in words is "eight hundred seventy million, six hundred thirty-nine thousand, one hundred sixty-four".