864618240 has 72 divisors (see below), whose sum is σ = 2761386768. Its totient is φ = 230563840.

The previous prime is 864618217. The next prime is 864618247. The reversal of 864618240 is 42816468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864618247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108741 + ... + 116420.

It is an arithmetic number, because the mean of its divisors is an integer number (38352594).

Almost surely, 2^864618240 is an apocalyptic number.

864618240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

864618240 is an abundant number, since it is smaller than the sum of its proper divisors (1896768528).

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

864618240 is a wasteful number, since it uses less digits than its factorization.

864618240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225185 (or 225171 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 864618240 is about 29404.3915087526. The cubic root of 864618240 is about 952.6677517454.

The spelling of 864618240 in words is "eight hundred sixty-four million, six hundred eighteen thousand, two hundred forty".