400290939 has 12 divisors (see below), whose sum is σ = 584695800. Its totient is φ = 263861664.

The previous prime is 400290929. The next prime is 400290953. The reversal of 400290939 is 939092004.

It is not a de Polignac number, because 400290939 - 2⁵ = 400290907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400290929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249069 + ... + 250670.

It is an arithmetic number, because the mean of its divisors is an integer number (48724650).

Almost surely, 2^400290939 is an apocalyptic number.

400290939 is a deficient number, since it is larger than the sum of its proper divisors (184404861).

400290939 is a wasteful number, since it uses less digits than its factorization.

400290939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499834 (or 499831 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 400290939 is about 20007.2721528948. The cubic root of 400290939 is about 736.9848945083.

The spelling of 400290939 in words is "four hundred million, two hundred ninety thousand, nine hundred thirty-nine".