40039642 has 16 divisors (see below), whose sum is σ = 63737280. Its totient is φ = 18823552.

The previous prime is 40039627. The next prime is 40039651. The reversal of 40039642 is 24693004.

It is a self number, because there is not a number n which added to its sum of digits gives 40039642.

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, 4663 + ... + 10090.

It is an arithmetic number, because the mean of its divisors is an integer number (3983580).

Almost surely, 2^40039642 is an apocalyptic number.

40039642 is a deficient number, since it is larger than the sum of its proper divisors (23697638).

40039642 is a wasteful number, since it uses less digits than its factorization.

40039642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 40039642 is about 6327.6885195148. The cubic root of 40039642 is about 342.1081301444.

The spelling of 40039642 in words is "forty million, thirty-nine thousand, six hundred forty-two".