864861374 has 64 divisors (see below), whose sum is σ = 1507645440. Its totient is φ = 369048960.

The previous prime is 864861337. The next prime is 864861379. The reversal of 864861374 is 473168468.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864861379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3809849 + ... + 3810075.

It is an arithmetic number, because the mean of its divisors is an integer number (23556960).

Almost surely, 2^864861374 is an apocalyptic number.

864861374 is a deficient number, since it is larger than the sum of its proper divisors (642784066).

864861374 is a wasteful number, since it uses less digits than its factorization.

864861374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 774144, while the sum is 47.

The square root of 864861374 is about 29408.5255325730. The cubic root of 864861374 is about 952.7570413310.

The spelling of 864861374 in words is "eight hundred sixty-four million, eight hundred sixty-one thousand, three hundred seventy-four".