400020442192 has 80 divisors (see below), whose sum is σ = 914503468032. Its totient is φ = 165876065280.

The previous prime is 400020442127. The next prime is 400020442207. The reversal of 400020442192 is 291244020004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 400020442192.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34134318 + ... + 34146034.

Almost surely, 2^400020442192 is an apocalyptic number.

It is an amenable number.

400020442192 is an abundant number, since it is smaller than the sum of its proper divisors (514483025840).

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

400020442192 is a wasteful number, since it uses less digits than its factorization.

400020442192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21596 (or 21590 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 400020442192 its reverse (291244020004), we get a palindrome (691264462196).

The spelling of 400020442192 in words is "four hundred billion, twenty million, four hundred forty-two thousand, one hundred ninety-two".