390437649 has 48 divisors (see below), whose sum is σ = 655155072. Its totient is φ = 219469824.

The previous prime is 390437617. The next prime is 390437651. The reversal of 390437649 is 946734093.

It is not a de Polignac number, because 390437649 - 2⁵ = 390437617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390437659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1981819 + ... + 1982015.

It is an arithmetic number, because the mean of its divisors is an integer number (13649064).

Almost surely, 2^390437649 is an apocalyptic number.

It is an amenable number.

390437649 is a deficient number, since it is larger than the sum of its proper divisors (264717423).

390437649 is a wasteful number, since it uses less digits than its factorization.

390437649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 390437649 is about 19759.4951605551. The cubic root of 390437649 is about 730.8875480995.

The spelling of 390437649 in words is "three hundred ninety million, four hundred thirty-seven thousand, six hundred forty-nine".