870221738 has 16 divisors (see below), whose sum is σ = 1382681664. Its totient is φ = 409348800.

The previous prime is 870221719. The next prime is 870221741. The reversal of 870221738 is 837122078.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129563 + ... + 136113.

It is an arithmetic number, because the mean of its divisors is an integer number (86417604).

Almost surely, 2^870221738 is an apocalyptic number.

870221738 is a deficient number, since it is larger than the sum of its proper divisors (512459926).

870221738 is a wasteful number, since it uses less digits than its factorization.

870221738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10477.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 870221738 is about 29499.5209791617. The cubic root of 870221738 is about 954.7213675043.

The spelling of 870221738 in words is "eight hundred seventy million, two hundred twenty-one thousand, seven hundred thirty-eight".