390549520 has 20 divisors (see below), whose sum is σ = 908027820. Its totient is φ = 156219776.

The previous prime is 390549479. The next prime is 390549547. The reversal of 390549520 is 25945093.

It can be written as a sum of positive squares in 2 ways, for example, as 47114496 + 343435024 = 6864^2 + 18532^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 390549520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440855 + ... + 2441014.

It is an arithmetic number, because the mean of its divisors is an integer number (45401391).

Almost surely, 2^390549520 is an apocalyptic number.

It is an amenable number.

390549520 is an abundant number, since it is smaller than the sum of its proper divisors (517478300).

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

390549520 is a wasteful number, since it uses less digits than its factorization.

390549520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881882 (or 4881876 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 390549520 is about 19762.3257740581. The cubic root of 390549520 is about 730.9573478170.

The spelling of 390549520 in words is "three hundred ninety million, five hundred forty-nine thousand, five hundred twenty".