870145728 has 28 divisors (see below), whose sum is σ = 2302261080. Its totient is φ = 290048512.

The previous prime is 870145681. The next prime is 870145739. The reversal of 870145728 is 827541078.

It is a self number, because there is not a number n which added to its sum of digits gives 870145728.

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 3 ways as a sum of consecutive naturals, for example, 2265813 + ... + 2266196.

It is an arithmetic number, because the mean of its divisors is an integer number (82223610).

Almost surely, 2^870145728 is an apocalyptic number.

It is an amenable number.

870145728 is an abundant number, since it is smaller than the sum of its proper divisors (1432115352).

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

870145728 is a wasteful number, since it uses less digits than its factorization.

870145728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532024 (or 4532014 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 870145728 is about 29498.2326250235. The cubic root of 870145728 is about 954.6935698059.

The spelling of 870145728 in words is "eight hundred seventy million, one hundred forty-five thousand, seven hundred twenty-eight".