390499045 has 4 divisors (see below), whose sum is σ = 468598860. Its totient is φ = 312399232.

The previous prime is 390499009. The next prime is 390499063. The reversal of 390499045 is 540994093.

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 68260644 + 322238401 = 8262^2 + 17951^2 .

It is a cyclic number.

It is not a de Polignac number, because 390499045 - 2²³ = 382110437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390498992 and 390499010.

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, 39049900 + ... + 39049909.

It is an arithmetic number, because the mean of its divisors is an integer number (117149715).

Almost surely, 2^390499045 is an apocalyptic number.

It is an amenable number.

390499045 is a deficient number, since it is larger than the sum of its proper divisors (78099815).

390499045 is an equidigital number, since it uses as much as digits as its factorization.

390499045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78099814.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 390499045 is about 19761.0486816869. The cubic root of 390499045 is about 730.9258565807.

The spelling of 390499045 in words is "three hundred ninety million, four hundred ninety-nine thousand, forty-five".