40046640 has 40 divisors (see below), whose sum is σ = 124145328. Its totient is φ = 10679040.

The previous prime is 40046603. The next prime is 40046681. The reversal of 40046640 is 4664004.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40046640.

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, 83191 + ... + 83670.

Almost surely, 2^40046640 is an apocalyptic number.

40046640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40046640 is an abundant number, since it is smaller than the sum of its proper divisors (84098688).

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

40046640 is a wasteful number, since it uses less digits than its factorization.

40046640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166877 (or 166871 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40046640 is about 6328.2414618913. The cubic root of 40046640 is about 342.1280598366.

The spelling of 40046640 in words is "forty million, forty-six thousand, six hundred forty".