400040424200 has 96 divisors (see below), whose sum is σ = 951412915200. Its totient is φ = 156386039040.

The previous prime is 400040424187. The next prime is 400040424221. The reversal of 400040424200 is 2424040004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1584266 + ... + 1819334.

It is an arithmetic number, because the mean of its divisors is an integer number (9910551200).

Almost surely, 2^400040424200 is an apocalyptic number.

400040424200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400040424200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475706457600).

400040424200 is an abundant number, since it is smaller than the sum of its proper divisors (551372491000).

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

400040424200 is a wasteful number, since it uses less digits than its factorization.

400040424200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235279 (or 235270 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400040424200 its reverse (2424040004), we get a palindrome (402464464204).

The spelling of 400040424200 in words is "four hundred billion, forty million, four hundred twenty-four thousand, two hundred".