861407364 has 12 divisors (see below), whose sum is σ = 2009950544. Its totient is φ = 287135784.

The previous prime is 861407363. The next prime is 861407369. The reversal of 861407364 is 463704168.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (861407363) 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, 35891962 + ... + 35891985.

Almost surely, 2^861407364 is an apocalyptic number.

It is an amenable number.

861407364 is an abundant number, since it is smaller than the sum of its proper divisors (1148543180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861407364 is a wasteful number, since it uses less digits than its factorization.

861407364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71783954 (or 71783952 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 861407364 is about 29349.7421453750. The cubic root of 861407364 is about 951.4870023492.

The spelling of 861407364 in words is "eight hundred sixty-one million, four hundred seven thousand, three hundred sixty-four".