40939239 has 32 divisors (see below), whose sum is σ = 61337088. Its totient is φ = 24080000.

The previous prime is 40939229. The next prime is 40939273. The reversal of 40939239 is 93293904.

It is a cyclic number.

It is not a de Polignac number, because 40939239 - 2⁵ = 40939207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40939197 and 40939206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40939229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236557 + ... + 236729.

It is an arithmetic number, because the mean of its divisors is an integer number (1916784).

Almost surely, 2^40939239 is an apocalyptic number.

40939239 is a deficient number, since it is larger than the sum of its proper divisors (20397849).

40939239 is a wasteful number, since it uses less digits than its factorization.

40939239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 40939239 is about 6398.3778412970. The cubic root of 40939239 is about 344.6513006945.

The spelling of 40939239 in words is "forty million, nine hundred thirty-nine thousand, two hundred thirty-nine".