40404002128 has 60 divisors (see below), whose sum is σ = 92086957620. Its totient is φ = 17121409536.

The previous prime is 40404002083. The next prime is 40404002129. The reversal of 40404002128 is 82120040404.

It can be written as a sum of positive squares in 2 ways, for example, as 25732009744 + 14671992384 = 160412^2 + 121128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404002129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219751 + ... + 359302.

It is an arithmetic number, because the mean of its divisors is an integer number (1534782627).

Almost surely, 2^40404002128 is an apocalyptic number.

It is an amenable number.

40404002128 is an abundant number, since it is smaller than the sum of its proper divisors (51682955492).

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

40404002128 is a wasteful number, since it uses less digits than its factorization.

40404002128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579164 (or 579151 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The spelling of 40404002128 in words is "forty billion, four hundred four million, two thousand, one hundred twenty-eight".