40242996 has 18 divisors (see below), whose sum is σ = 101725442. Its totient is φ = 13414320.

The previous prime is 40242989. The next prime is 40243001. The reversal of 40242996 is 69924204.

It can be written as a sum of positive squares in only one way, i.e., 29550096 + 10692900 = 5436^2 + 3270^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1117861 = 40242996 / (4 + 0 + 2 + 4 + 2 + 9 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 40242996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558895 + ... + 558966.

Almost surely, 2^40242996 is an apocalyptic number.

It is an amenable number.

40242996 is an abundant number, since it is smaller than the sum of its proper divisors (61482446).

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

40242996 is a wasteful number, since it uses less digits than its factorization.

40242996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117871 (or 1117866 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 40242996 is about 6343.7367536808. The cubic root of 40242996 is about 342.6863205598.

The spelling of 40242996 in words is "forty million, two hundred forty-two thousand, nine hundred ninety-six".