864117492 has 96 divisors (see below), whose sum is σ = 2462100480. Its totient is φ = 230376960.

The previous prime is 864117487. The next prime is 864117509. The reversal of 864117492 is 294711468.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 102892 + ... + 110972.

It is an arithmetic number, because the mean of its divisors is an integer number (25646880).

Almost surely, 2^864117492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864117492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231050240).

864117492 is an abundant number, since it is smaller than the sum of its proper divisors (1597982988).

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

864117492 is a wasteful number, since it uses less digits than its factorization.

864117492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8181 (or 8179 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 864117492 is about 29395.8754249640. The cubic root of 864117492 is about 952.4838021233.

The spelling of 864117492 in words is "eight hundred sixty-four million, one hundred seventeen thousand, four hundred ninety-two".