390432485 has 4 divisors (see below), whose sum is σ = 468518988. Its totient is φ = 312345984.

The previous prime is 390432461. The next prime is 390432499. The reversal of 390432485 is 584234093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283888801 + 106543684 = 16849^2 + 10322^2 .

It is a cyclic number.

It is not a de Polignac number, because 390432485 - 2²⁰ = 389383909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39043244 + ... + 39043253.

It is an arithmetic number, because the mean of its divisors is an integer number (117129747).

Almost surely, 2^390432485 is an apocalyptic number.

It is an amenable number.

390432485 is a deficient number, since it is larger than the sum of its proper divisors (78086503).

390432485 is an equidigital number, since it uses as much as digits as its factorization.

390432485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086502.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 390432485 is about 19759.3644887684. The cubic root of 390432485 is about 730.8843258010.

The spelling of 390432485 in words is "three hundred ninety million, four hundred thirty-two thousand, four hundred eighty-five".