400422044040 has 64 divisors (see below), whose sum is σ = 1217721859200. Its totient is φ = 105316480512.

The previous prime is 400422044017. The next prime is 400422044041. The reversal of 400422044040 is 40440224004.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 400422044040.

It is not an unprimeable number, because it can be changed into a prime (400422044041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22846380 + ... + 22863899.

It is an arithmetic number, because the mean of its divisors is an integer number (19026904050).

Almost surely, 2^400422044040 is an apocalyptic number.

400422044040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400422044040 is an abundant number, since it is smaller than the sum of its proper divisors (817299815160).

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

400422044040 is a wasteful number, since it uses less digits than its factorization.

400422044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45710366 (or 45710362 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400422044040 its reverse (40440224004), we get a palindrome (440862268044).

The spelling of 400422044040 in words is "four hundred billion, four hundred twenty-two million, forty-four thousand, forty".