72064440 has 96 divisors (see below), whose sum is σ = 267677280. Its totient is φ = 16471296.

The previous prime is 72064439. The next prime is 72064453. The reversal of 72064440 is 4446027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11779 + ... + 16818.

It is an arithmetic number, because the mean of its divisors is an integer number (2788305).

Almost surely, 2^72064440 is an apocalyptic number.

72064440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72064440 is an abundant number, since it is smaller than the sum of its proper divisors (195612840).

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

72064440 is a wasteful number, since it uses less digits than its factorization.

72064440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28621 (or 28614 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 72064440 is about 8489.0776884182. The cubic root of 72064440 is about 416.1408392702.

The spelling of 72064440 in words is "seventy-two million, sixty-four thousand, four hundred forty".