40056239 has 8 divisors (see below), whose sum is σ = 40734720. Its totient is φ = 39382200.

The previous prime is 40056229. The next prime is 40056253. The reversal of 40056239 is 93265004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40056239 - 2²⁰ = 39007663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40056229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20474 + ... + 22344.

It is an arithmetic number, because the mean of its divisors is an integer number (5091840).

Almost surely, 2^40056239 is an apocalyptic number.

40056239 is a deficient number, since it is larger than the sum of its proper divisors (678481).

40056239 is a wasteful number, since it uses less digits than its factorization.

40056239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 40056239 is about 6328.9998419972. Note that the first 3 decimals coincide. The cubic root of 40056239 is about 342.1553931734.

The spelling of 40056239 in words is "forty million, fifty-six thousand, two hundred thirty-nine".