400006817 has 8 divisors (see below), whose sum is σ = 463974336. Its totient is φ = 337745232.

The previous prime is 400006813. The next prime is 400006819. The reversal of 400006817 is 718600004.

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 400006817 - 2² = 400006813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400006811) 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, 425978 + ... + 426915.

It is an arithmetic number, because the mean of its divisors is an integer number (57996792).

Almost surely, 2^400006817 is an apocalyptic number.

It is an amenable number.

400006817 is a deficient number, since it is larger than the sum of its proper divisors (63967519).

400006817 is an equidigital number, since it uses as much as digits as its factorization.

400006817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852967.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 400006817 is about 20000.1704242739. The cubic root of 400006817 is about 736.8104853781.

The spelling of 400006817 in words is "four hundred million, six thousand, eight hundred seventeen".