390221461 has 8 divisors (see below), whose sum is σ = 446211584. Its totient is φ = 334292400.

The previous prime is 390221443. The next prime is 390221471. The reversal of 390221461 is 164122093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390221461 - 2²⁵ = 356667029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390221441) 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, 630 + ... + 27943.

It is an arithmetic number, because the mean of its divisors is an integer number (55776448).

Almost surely, 2^390221461 is an apocalyptic number.

It is an amenable number.

390221461 is a deficient number, since it is larger than the sum of its proper divisors (55990123).

390221461 is a wasteful number, since it uses less digits than its factorization.

390221461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30531.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 390221461 is about 19754.0239191918. The cubic root of 390221461 is about 730.7526240468.

The spelling of 390221461 in words is "three hundred ninety million, two hundred twenty-one thousand, four hundred sixty-one".