72021590 has 32 divisors (see below), whose sum is σ = 138136320. Its totient is φ = 26957664.

The previous prime is 72021577. The next prime is 72021601. The reversal of 72021590 is 9512027.

It is a super-2 number, since 2×72021590² = 10374218852256200, which contains 22 as substring.

It is a congruent number.

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, 13487 + ... + 18053.

It is an arithmetic number, because the mean of its divisors is an integer number (4316760).

Almost surely, 2^72021590 is an apocalyptic number.

72021590 is a deficient number, since it is larger than the sum of its proper divisors (66114730).

72021590 is a wasteful number, since it uses less digits than its factorization.

72021590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 72021590 is about 8486.5534818323. The cubic root of 72021590 is about 416.0583428712.

The spelling of 72021590 in words is "seventy-two million, twenty-one thousand, five hundred ninety".