40240402420420 has 12 divisors (see below), whose sum is σ = 84504845082924. Its totient is φ = 16096160968160.

The previous prime is 40240402420417. The next prime is 40240402420483. The reversal of 40240402420420 is 2402420404204.

It can be written as a sum of positive squares in 2 ways, for example, as 8127961517764 + 32112440902656 = 2850958^2 + 5666784^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006010060491 + ... + 1006010060530.

It is an arithmetic number, because the mean of its divisors is an integer number (7042070423577).

Almost surely, 2^{40240402420420} is an apocalyptic number.

It is an amenable number.

40240402420420 is an abundant number, since it is smaller than the sum of its proper divisors (44264442662504).

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

40240402420420 is a wasteful number, since it uses less digits than its factorization.

40240402420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012020121030 (or 2012020121028 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 40240402420420 its reverse (2402420404204), we get a palindrome (42642822824624).

The spelling of 40240402420420 in words is "forty trillion, two hundred forty billion, four hundred two million, four hundred twenty thousand, four hundred twenty".