390989433 has 8 divisors (see below), whose sum is σ = 521411200. Its totient is φ = 260613648.

The previous prime is 390989419. The next prime is 390989437. The reversal of 390989433 is 334989093.

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

It is not a de Polignac number, because 390989433 - 2⁹ = 390988921 is a prime.

It is a super-2 number, since 2×390989433² = 305745473435322978, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390989437) 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, 24063 + ... + 36891.

It is an arithmetic number, because the mean of its divisors is an integer number (65176400).

Almost surely, 2^390989433 is an apocalyptic number.

It is an amenable number.

390989433 is a deficient number, since it is larger than the sum of its proper divisors (130421767).

390989433 is a wasteful number, since it uses less digits than its factorization.

390989433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22991.

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 390989433 is about 19773.4527333999. The cubic root of 390989433 is about 731.2316937195.

The spelling of 390989433 in words is "three hundred ninety million, nine hundred eighty-nine thousand, four hundred thirty-three".