864002720 has 48 divisors (see below), whose sum is σ = 2332810368. Its totient is φ = 296229120.

The previous prime is 864002701. The next prime is 864002729. The reversal of 864002720 is 27200468.

It is not an unprimeable number, because it can be changed into a prime (864002729) 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, 384596 + ... + 386835.

It is an arithmetic number, because the mean of its divisors is an integer number (48600216).

Almost surely, 2^864002720 is an apocalyptic number.

864002720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

864002720 is an abundant number, since it is smaller than the sum of its proper divisors (1468807648).

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

864002720 is a wasteful number, since it uses less digits than its factorization.

864002720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771453 (or 771445 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 864002720 is about 29393.9231815013. The cubic root of 864002720 is about 952.4416306546.

The spelling of 864002720 in words is "eight hundred sixty-four million, two thousand, seven hundred twenty".