879745690 has 8 divisors (see below), whose sum is σ = 1583542260. Its totient is φ = 351898272.

The previous prime is 879745681. The next prime is 879745693. The reversal of 879745690 is 96547978.

It can be written as a sum of positive squares in 2 ways, for example, as 876811321 + 2934369 = 29611^2 + 1713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×879745690² = 1547904958147152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (879745693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43987275 + ... + 43987294.

Almost surely, 2^879745690 is an apocalyptic number.

879745690 is a deficient number, since it is larger than the sum of its proper divisors (703796570).

879745690 is a wasteful number, since it uses less digits than its factorization.

879745690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87974576.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 879745690 is about 29660.5072444825. The cubic root of 879745690 is about 958.1916514595.

The spelling of 879745690 in words is "eight hundred seventy-nine million, seven hundred forty-five thousand, six hundred ninety".