400815401 has 8 divisors (see below), whose sum is σ = 459859200. Its totient is φ = 342217728.

The previous prime is 400815397. The next prime is 400815433. The reversal of 400815401 is 104518004.

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 400815401 - 2² = 400815397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400815451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109601 + ... + 113198.

It is an arithmetic number, because the mean of its divisors is an integer number (57482400).

Almost surely, 2^400815401 is an apocalyptic number.

It is an amenable number.

400815401 is a deficient number, since it is larger than the sum of its proper divisors (59043799).

400815401 is a wasteful number, since it uses less digits than its factorization.

400815401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223063.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 400815401 is about 20020.3746468441. The cubic root of 400815401 is about 737.3066204083.

The spelling of 400815401 in words is "four hundred million, eight hundred fifteen thousand, four hundred one".