40404024020 has 24 divisors (see below), whose sum is σ = 89314159200. Its totient is φ = 15310998432.

The previous prime is 40404023999. The next prime is 40404024029. The reversal of 40404024020 is 2042040404.

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

It is a junction number, because it is equal to n+sod(n) for n = 40404023983 and 40404024001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404024029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53162810 + ... + 53163569.

It is an arithmetic number, because the mean of its divisors is an integer number (3721423300).

Almost surely, 2^40404024020 is an apocalyptic number.

It is an amenable number.

40404024020 is an abundant number, since it is smaller than the sum of its proper divisors (48910135180).

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

40404024020 is a wasteful number, since it uses less digits than its factorization.

40404024020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106326407 (or 106326405 counting only the distinct ones).

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

Adding to 40404024020 its reverse (2042040404), we get a palindrome (42446064424).

The spelling of 40404024020 in words is "forty billion, four hundred four million, twenty-four thousand, twenty".