400073013 has 28 divisors (see below), whose sum is σ = 608862208. Its totient is φ = 262702440.

The previous prime is 400072999. The next prime is 400073021. The reversal of 400073013 is 310370004.

It is not a de Polignac number, because 400073013 - 2⁹ = 400072501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400073213) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 44748 + ... + 52938.

Almost surely, 2^400073013 is an apocalyptic number.

It is an amenable number.

400073013 is a deficient number, since it is larger than the sum of its proper divisors (208789195).

400073013 is an frugal number, since it uses more digits than its factorization.

400073013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8276 (or 8261 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 400073013 is about 20001.8252417123. The cubic root of 400073013 is about 736.8511273660.

The spelling of 400073013 in words is "four hundred million, seventy-three thousand, thirteen".