400309013 has 8 divisors (see below), whose sum is σ = 456461208. Its totient is φ = 347779584.

The previous prime is 400309001. The next prime is 400309033. The reversal of 400309013 is 310903004.

It can be written as a sum of positive squares in 4 ways, for example, as 92025649 + 308283364 = 9593^2 + 17558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400309013 - 2⁶ = 400308949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400309033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905456 + ... + 905897.

It is an arithmetic number, because the mean of its divisors is an integer number (57057651).

Almost surely, 2^400309013 is an apocalyptic number.

It is an amenable number.

400309013 is a deficient number, since it is larger than the sum of its proper divisors (56152195).

400309013 is a wasteful number, since it uses less digits than its factorization.

400309013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811383.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 400309013 is about 20007.7238335599. The cubic root of 400309013 is about 736.9959864943.

The spelling of 400309013 in words is "four hundred million, three hundred nine thousand, thirteen".