870623428 has 6 divisors (see below), whose sum is σ = 1523591006. Its totient is φ = 435311712.

The previous prime is 870623407. The next prime is 870623447. The reversal of 870623428 is 824326078.

It can be written as a sum of positive squares in only one way, i.e., 461046784 + 409576644 = 21472^2 + 20238^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108827925 + ... + 108827932.

Almost surely, 2^870623428 is an apocalyptic number.

It is an amenable number.

870623428 is a deficient number, since it is larger than the sum of its proper divisors (652967578).

870623428 is a wasteful number, since it uses less digits than its factorization.

870623428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217655861 (or 217655859 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 870623428 is about 29506.3286093001. The cubic root of 870623428 is about 954.8682431097.

The spelling of 870623428 in words is "eight hundred seventy million, six hundred twenty-three thousand, four hundred twenty-eight".