40400420406 has 64 divisors (see below), whose sum is σ = 85940040960. Its totient is φ = 12617579520.

The previous prime is 40400420393. The next prime is 40400420407. The reversal of 40400420406 is 60402400404.

40400420406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400420407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34500201 + ... + 34501371.

It is an arithmetic number, because the mean of its divisors is an integer number (1342813140).

Almost surely, 2^40400420406 is an apocalyptic number.

40400420406 is an abundant number, since it is smaller than the sum of its proper divisors (45539620554).

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

40400420406 is a wasteful number, since it uses less digits than its factorization.

40400420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429.

The product of its (nonzero) digits is 3072, while the sum is 24.

The spelling of 40400420406 in words is "forty billion, four hundred million, four hundred twenty thousand, four hundred six".