861079934 has 64 divisors (see below), whose sum is σ = 1604413440. Its totient is φ = 341003520.

The previous prime is 861079907. The next prime is 861079951. The reversal of 861079934 is 439970168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518834 + ... + 520490.

It is an arithmetic number, because the mean of its divisors is an integer number (25068960).

Almost surely, 2^861079934 is an apocalyptic number.

861079934 is a deficient number, since it is larger than the sum of its proper divisors (743333506).

861079934 is a wasteful number, since it uses less digits than its factorization.

861079934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 861079934 is about 29344.1635423469. The cubic root of 861079934 is about 951.3664303316.

The spelling of 861079934 in words is "eight hundred sixty-one million, seventy-nine thousand, nine hundred thirty-four".