401001204400 has 60 divisors (see below), whose sum is σ = 964189197664. Its totient is φ = 160269984000.

The previous prime is 401001204391. The next prime is 401001204437. The reversal of 401001204400 is 4402100104.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85210 + ... + 899590.

Almost surely, 2^401001204400 is an apocalyptic number.

401001204400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401001204400 is an abundant number, since it is smaller than the sum of its proper divisors (563187993264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401001204400 is a wasteful number, since it uses less digits than its factorization.

401001204400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815630 (or 815619 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 401001204400 its reverse (4402100104), we get a palindrome (405403304504).

The spelling of 401001204400 in words is "four hundred one billion, one million, two hundred four thousand, four hundred".