864933520 has 80 divisors (see below), whose sum is σ = 2199234240. Its totient is φ = 313740800.

The previous prime is 864933491. The next prime is 864933533. The reversal of 864933520 is 25339468.

864933520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446955 + ... + 448885.

It is an arithmetic number, because the mean of its divisors is an integer number (27490428).

Almost surely, 2^864933520 is an apocalyptic number.

864933520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864933520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099617120).

864933520 is an abundant number, since it is smaller than the sum of its proper divisors (1334300720).

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

864933520 is a wasteful number, since it uses less digits than its factorization.

864933520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 864933520 is about 29409.7521240829. The cubic root of 864933520 is about 952.7835333217.

The spelling of 864933520 in words is "eight hundred sixty-four million, nine hundred thirty-three thousand, five hundred twenty".