40020400002 has 32 divisors (see below), whose sum is σ = 88369263360. Its totient is φ = 11981279120.

The previous prime is 40020399983. The next prime is 40020400051. The reversal of 40020400002 is 20000402004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3647352 + ... + 3658307.

It is an arithmetic number, because the mean of its divisors is an integer number (2761539480).

Almost surely, 2^40020400002 is an apocalyptic number.

40020400002 is an abundant number, since it is smaller than the sum of its proper divisors (48348863358).

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

40020400002 is a wasteful number, since it uses less digits than its factorization.

40020400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7305758.

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 40020400002 its reverse (20000402004), we get a palindrome (60020802006).

It can be divided in two parts, 400 and 20400002, that added together give a palindrome (20400402).

The spelling of 40020400002 in words is "forty billion, twenty million, four hundred thousand, two".