40645404 has 36 divisors (see below), whose sum is σ = 102977784. Its totient is φ = 13517472.

The previous prime is 40645399. The next prime is 40645463. The reversal of 40645404 is 40454604.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19039 + ... + 21065.

It is an arithmetic number, because the mean of its divisors is an integer number (2860494).

Almost surely, 2^40645404 is an apocalyptic number.

It is an amenable number.

40645404 is an abundant number, since it is smaller than the sum of its proper divisors (62332380).

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

40645404 is a wasteful number, since it uses less digits than its factorization.

40645404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2589 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 40645404 is about 6375.3748125110. The cubic root of 40645404 is about 343.8247597619.

The spelling of 40645404 in words is "forty million, six hundred forty-five thousand, four hundred four".