870721824 has 48 divisors (see below), whose sum is σ = 2612167488. Its totient is φ = 248777472.

The previous prime is 870721811. The next prime is 870721829. The reversal of 870721824 is 428127078.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (870721829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647187 + ... + 648530.

It is an arithmetic number, because the mean of its divisors is an integer number (54420156).

Almost surely, 2^870721824 is an apocalyptic number.

870721824 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

870721824 is an abundant number, since it is smaller than the sum of its proper divisors (1741445664).

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

870721824 is a wasteful number, since it uses less digits than its factorization.

870721824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295737 (or 1295729 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 870721824 is about 29507.9959333059. The cubic root of 870721824 is about 954.9042141442.

The spelling of 870721824 in words is "eight hundred seventy million, seven hundred twenty-one thousand, eight hundred twenty-four".