40020404240 has 40 divisors (see below), whose sum is σ = 93110290560. Its totient is φ = 15997348736.

The previous prime is 40020404227. The next prime is 40020404267. The reversal of 40020404240 is 4240402004.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 49250 + ... + 287169.

It is an arithmetic number, because the mean of its divisors is an integer number (2327757264).

Almost surely, 2^40020404240 is an apocalyptic number.

40020404240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40020404240 is an abundant number, since it is smaller than the sum of its proper divisors (53089886320).

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

40020404240 is a wasteful number, since it uses less digits than its factorization.

40020404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337919 (or 337913 counting only the distinct ones).

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

Adding to 40020404240 its reverse (4240402004), we get a palindrome (44260806244).

The spelling of 40020404240 in words is "forty billion, twenty million, four hundred four thousand, two hundred forty".