40634406 has 16 divisors (see below), whose sum is σ = 90298800. Its totient is φ = 13544784.

The previous prime is 40634389. The next prime is 40634417. The reversal of 40634406 is 60443604.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40634406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376191 + ... + 376298.

It is an arithmetic number, because the mean of its divisors is an integer number (5643675).

Almost surely, 2^40634406 is an apocalyptic number.

40634406 is an abundant number, since it is smaller than the sum of its proper divisors (49664394).

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

40634406 is a wasteful number, since it uses less digits than its factorization.

40634406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752500 (or 752494 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 40634406 is about 6374.5122166327. The cubic root of 40634406 is about 343.7937457935.

The spelling of 40634406 in words is "forty million, six hundred thirty-four thousand, four hundred six".