390281793 has 36 divisors (see below), whose sum is σ = 602461584. Its totient is φ = 222847200.

The previous prime is 390281777. The next prime is 390281813. The reversal of 390281793 is 397182093.

It is not a de Polignac number, because 390281793 - 2⁴ = 390281777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390281713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2156163 + ... + 2156343.

It is an arithmetic number, because the mean of its divisors is an integer number (16735044).

Almost surely, 2^390281793 is an apocalyptic number.

390281793 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

390281793 is a deficient number, since it is larger than the sum of its proper divisors (212179791).

390281793 is a wasteful number, since it uses less digits than its factorization.

390281793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 390281793 is about 19755.5509414443. The cubic root of 390281793 is about 730.7902825730.

The spelling of 390281793 in words is "three hundred ninety million, two hundred eighty-one thousand, seven hundred ninety-three".