390400949 has 16 divisors (see below), whose sum is σ = 417885696. Its totient is φ = 364046400.

The previous prime is 390400943. The next prime is 390400973. The reversal of 390400949 is 949004093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390400949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390400943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121139 + ... + 124319.

It is an arithmetic number, because the mean of its divisors is an integer number (26117856).

Almost surely, 2^390400949 is an apocalyptic number.

It is an amenable number.

390400949 is a deficient number, since it is larger than the sum of its proper divisors (27484747).

390400949 is a wasteful number, since it uses less digits than its factorization.

390400949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 390400949 is about 19758.5664712802. The cubic root of 390400949 is about 730.8646469495.

The spelling of 390400949 in words is "three hundred ninety million, four hundred thousand, nine hundred forty-nine".