390043820 has 48 divisors (see below), whose sum is σ = 831061728. Its totient is φ = 153753600.

The previous prime is 390043817. The next prime is 390043831. The reversal of 390043820 is 28340093.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712787 + ... + 713333.

It is an arithmetic number, because the mean of its divisors is an integer number (17313786).

Almost surely, 2^390043820 is an apocalyptic number.

It is an amenable number.

390043820 is an abundant number, since it is smaller than the sum of its proper divisors (441017908).

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

390043820 is a wasteful number, since it uses less digits than its factorization.

390043820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 390043820 is about 19749.5270829456. The cubic root of 390043820 is about 730.6417200748.

It can be divided in two parts, 39004 and 3820, that added together give a palindrome (42824).

The spelling of 390043820 in words is "three hundred ninety million, forty-three thousand, eight hundred twenty".