390284433 has 64 divisors (see below), whose sum is σ = 724285440. Its totient is φ = 201787200.

The previous prime is 390284423. The next prime is 390284437. The reversal of 390284433 is 334482093.

It is a happy number.

It is not a de Polignac number, because 390284433 - 2⁶ = 390284369 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (390284437) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 721143 + ... + 721683.

It is an arithmetic number, because the mean of its divisors is an integer number (11316960).

Almost surely, 2^390284433 is an apocalyptic number.

390284433 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

390284433 is a deficient number, since it is larger than the sum of its proper divisors (334001007).

390284433 is a wasteful number, since it uses less digits than its factorization.

390284433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 390284433 is about 19755.6177579948. The cubic root of 390284433 is about 730.7919303414.

The spelling of 390284433 in words is "three hundred ninety million, two hundred eighty-four thousand, four hundred thirty-three".