40040810406 has 64 divisors (see below), whose sum is σ = 93780153600. Its totient is φ = 12628612800.

The previous prime is 40040810399. The next prime is 40040810437. The reversal of 40040810406 is 60401804004.

40040810406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40040810406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808026 + ... + 856146.

It is an arithmetic number, because the mean of its divisors is an integer number (1465314900).

Almost surely, 2^40040810406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40040810406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46890076800).

40040810406 is an abundant number, since it is smaller than the sum of its proper divisors (53739343194).

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

40040810406 is a wasteful number, since it uses less digits than its factorization.

40040810406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48962 (or 48956 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The spelling of 40040810406 in words is "forty billion, forty million, eight hundred ten thousand, four hundred six".