390221272 has 32 divisors (see below), whose sum is σ = 856588320. Its totient is φ = 163157760.

The previous prime is 390221269. The next prime is 390221309. The reversal of 390221272 is 272122093.

It is a super-2 number, since 2×390221272² = 304545282242595968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 390221272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82683 + ... + 87274.

It is an arithmetic number, because the mean of its divisors is an integer number (26768385).

Almost surely, 2^390221272 is an apocalyptic number.

It is an amenable number.

390221272 is an abundant number, since it is smaller than the sum of its proper divisors (466367048).

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

390221272 is a wasteful number, since it uses less digits than its factorization.

390221272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170011 (or 170007 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 390221272 is about 19754.0191353557. The cubic root of 390221272 is about 730.7525060691.

The spelling of 390221272 in words is "three hundred ninety million, two hundred twenty-one thousand, two hundred seventy-two".