390664898949 has 48 divisors (see below), whose sum is σ = 593910542400. Its totient is φ = 227684141568.

The previous prime is 390664898927. The next prime is 390664898959. The reversal of 390664898949 is 949898466093.

It is a happy number.

It is not a de Polignac number, because 390664898949 - 2⁵ = 390664898917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390664898959) 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, 55260987 + ... + 55268055.

It is an arithmetic number, because the mean of its divisors is an integer number (12373136300).

Almost surely, 2^390664898949 is an apocalyptic number.

390664898949 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

390664898949 is a deficient number, since it is larger than the sum of its proper divisors (203245643451).

390664898949 is a wasteful number, since it uses less digits than its factorization.

390664898949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 725594112, while the sum is 75.

The spelling of 390664898949 in words is "three hundred ninety billion, six hundred sixty-four million, eight hundred ninety-eight thousand, nine hundred forty-nine".