400040403999 has 8 divisors (see below), whose sum is σ = 533390168112. Its totient is φ = 266692121280.

The previous prime is 400040403877. The next prime is 400040404021. The reversal of 400040403999 is 999304040004.

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

It is not a de Polignac number, because 400040403999 - 2³⁶ = 331320927263 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 400040403999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040404999) 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, 709827 + ... + 1141899.

It is an arithmetic number, because the mean of its divisors is an integer number (66673771014).

Almost surely, 2^400040403999 is an apocalyptic number.

400040403999 is a deficient number, since it is larger than the sum of its proper divisors (133349764113).

400040403999 is a wasteful number, since it uses less digits than its factorization.

400040403999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740697.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 400040403999 in words is "four hundred billion, forty million, four hundred three thousand, nine hundred ninety-nine".