40253239 has 4 divisors (see below), whose sum is σ = 43349656. Its totient is φ = 37156824.

The previous prime is 40253233. The next prime is 40253261. The reversal of 40253239 is 93235204.

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 40253239 - 2³ = 40253231 is a prime.

It is a super-2 number, since 2×40253239² = 3240646499982242, 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 (40253231) 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, 1548189 + ... + 1548214.

It is an arithmetic number, because the mean of its divisors is an integer number (10837414).

Almost surely, 2^40253239 is an apocalyptic number.

40253239 is a deficient number, since it is larger than the sum of its proper divisors (3096417).

40253239 is a wasteful number, since it uses less digits than its factorization.

40253239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096416.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 40253239 is about 6344.5440340500. The cubic root of 40253239 is about 342.7153926018.

The spelling of 40253239 in words is "forty million, two hundred fifty-three thousand, two hundred thirty-nine".