390221271 has 12 divisors (see below), whose sum is σ = 614894280. Its totient is φ = 236497680.

The previous prime is 390221269. The next prime is 390221309. The reversal of 390221271 is 172122093.

390221271 is a `hidden beast` number, since 390 + 2 + 2 + 1 + 271 = 666.

It is not a de Polignac number, because 390221271 - 2¹ = 390221269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390221201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1970716 + ... + 1970913.

It is an arithmetic number, because the mean of its divisors is an integer number (51241190).

Almost surely, 2^390221271 is an apocalyptic number.

390221271 is a deficient number, since it is larger than the sum of its proper divisors (224673009).

390221271 is a wasteful number, since it uses less digits than its factorization.

390221271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941646 (or 3941643 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 390221271 is about 19754.0191100444. The cubic root of 390221271 is about 730.7525054449.

The spelling of 390221271 in words is "three hundred ninety million, two hundred twenty-one thousand, two hundred seventy-one".