400244401999 has 12 divisors (see below), whose sum is σ = 433424520000. Its totient is φ = 369436102464.

The previous prime is 400244401993. The next prime is 400244402009. The reversal of 400244401999 is 999104442004.

It is not a de Polignac number, because 400244401999 - 2²³ = 400236013391 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 (400244401993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3652002 + ... + 3760000.

It is an arithmetic number, because the mean of its divisors is an integer number (36118710000).

Almost surely, 2^400244401999 is an apocalyptic number.

400244401999 is a deficient number, since it is larger than the sum of its proper divisors (33180118001).

400244401999 is a wasteful number, since it uses less digits than its factorization.

400244401999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129954 (or 129941 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 400244401999 in words is "four hundred billion, two hundred forty-four million, four hundred one thousand, nine hundred ninety-nine".