40013764 has 12 divisors (see below), whose sum is σ = 80027584. Its totient is φ = 17148744.

The previous prime is 40013759. The next prime is 40013773. The reversal of 40013764 is 46731004.

40013764 is an admirable number.

It is a super-2 number, since 2×40013764² = 3202202618895392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714504 + ... + 714559.

Almost surely, 2^40013764 is an apocalyptic number.

It is an amenable number.

40013764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40013764 is a wasteful number, since it uses less digits than its factorization.

40013764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429074 (or 1429072 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 40013764 is about 6325.6433664885. The cubic root of 40013764 is about 342.0344116851.

Adding to 40013764 its reverse (46731004), we get a palindrome (86744768).

The spelling of 40013764 in words is "forty million, thirteen thousand, seven hundred sixty-four".