390432228 has 24 divisors (see below), whose sum is σ = 940396800. Its totient is φ = 125945760.

The previous prime is 390432227. The next prime is 390432239. The reversal of 390432228 is 822234093.

It is a super-2 number, since 2×390432228² = 304874649322087968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390432221) 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, 524403 + ... + 525146.

It is an arithmetic number, because the mean of its divisors is an integer number (39183200).

Almost surely, 2^390432228 is an apocalyptic number.

It is an amenable number.

390432228 is an abundant number, since it is smaller than the sum of its proper divisors (549964572).

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

390432228 is a wasteful number, since it uses less digits than its factorization.

390432228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049587 (or 1049585 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 390432228 is about 19759.3579855217. The cubic root of 390432228 is about 730.8841654341.

The spelling of 390432228 in words is "three hundred ninety million, four hundred thirty-two thousand, two hundred twenty-eight".