40404020402 has 8 divisors (see below), whose sum is σ = 60836472576. Its totient is φ = 20125196212.

The previous prime is 40404020401. The next prime is 40404020431. The reversal of 40404020402 is 20402040404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40404020401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38406338 + ... + 38407389.

It is an arithmetic number, because the mean of its divisors is an integer number (7604559072).

Almost surely, 2^40404020402 is an apocalyptic number.

40404020402 is a deficient number, since it is larger than the sum of its proper divisors (20432452174).

40404020402 is a wasteful number, since it uses less digits than its factorization.

40404020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76813992.

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

Adding to 40404020402 its reverse (20402040404), we get a palindrome (60806060806).

The spelling of 40404020402 in words is "forty billion, four hundred four million, twenty thousand, four hundred two".