40613440 has 56 divisors (see below), whose sum is σ = 110532672. Its totient is φ = 13923840.

The previous prime is 40613407. The next prime is 40613483. The reversal of 40613440 is 4431604.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

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, 6826 + ... + 11305.

Almost surely, 2^40613440 is an apocalyptic number.

40613440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40613440 is an abundant number, since it is smaller than the sum of its proper divisors (69919232).

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

40613440 is a wasteful number, since it uses less digits than its factorization.

40613440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18155 (or 18145 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 40613440 is about 6372.8674864616. The cubic root of 40613440 is about 343.7346069140.

The spelling of 40613440 in words is "forty million, six hundred thirteen thousand, four hundred forty".