40024139 has 4 divisors (see below), whose sum is σ = 40316424. Its totient is φ = 39731856.

The previous prime is 40024133. The next prime is 40024151. The reversal of 40024139 is 93142004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40024139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40024133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145937 + ... + 146210.

It is an arithmetic number, because the mean of its divisors is an integer number (10079106).

Almost surely, 2^40024139 is an apocalyptic number.

40024139 is a deficient number, since it is larger than the sum of its proper divisors (292285).

40024139 is a wasteful number, since it uses less digits than its factorization.

40024139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292284.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40024139 is about 6326.4633880234. The cubic root of 40024139 is about 342.0639706835.

The spelling of 40024139 in words is "forty million, twenty-four thousand, one hundred thirty-nine".