870784690 has 16 divisors (see below), whose sum is σ = 1569074328. Its totient is φ = 347944576.

The previous prime is 870784657. The next prime is 870784721. The reversal of 870784690 is 96487078.

It can be written as a sum of positive squares in 4 ways, for example, as 849780801 + 21003889 = 29151^2 + 4583^2 .

It is a super-2 number, since 2×870784690² = 1516531952676792200, which contains 22 as substring.

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, 36157 + ... + 55216.

Almost surely, 2^870784690 is an apocalyptic number.

870784690 is a deficient number, since it is larger than the sum of its proper divisors (698289638).

870784690 is a wasteful number, since it uses less digits than its factorization.

870784690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92333.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 870784690 is about 29509.0611507720. The cubic root of 870784690 is about 954.9271949103.

The spelling of 870784690 in words is "eight hundred seventy million, seven hundred eighty-four thousand, six hundred ninety".