40130239 has 4 divisors (see below), whose sum is σ = 41875056. Its totient is φ = 38385424.

The previous prime is 40130231. The next prime is 40130263. The reversal of 40130239 is 93203104.

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

It is a cyclic number.

It is not a de Polignac number, because 40130239 - 2³ = 40130231 is a prime.

It is a super-2 number, since 2×40130239² = 3220872164394242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40130231) 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, 872374 + ... + 872419.

It is an arithmetic number, because the mean of its divisors is an integer number (10468764).

Almost surely, 2^40130239 is an apocalyptic number.

40130239 is a deficient number, since it is larger than the sum of its proper divisors (1744817).

40130239 is a wasteful number, since it uses less digits than its factorization.

40130239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744816.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40130239 is about 6334.8432498366. The cubic root of 40130239 is about 342.3659631448.

The spelling of 40130239 in words is "forty million, one hundred thirty thousand, two hundred thirty-nine".