40394039 has 16 divisors (see below), whose sum is σ = 47220288. Its totient is φ = 33841152.

The previous prime is 40394027. The next prime is 40394063. The reversal of 40394039 is 93049304.

It is a cyclic number.

It is not a de Polignac number, because 40394039 - 2⁸ = 40393783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40393996 and 40394014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40394239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69719 + ... + 70295.

It is an arithmetic number, because the mean of its divisors is an integer number (2951268).

Almost surely, 2^40394039 is an apocalyptic number.

40394039 is a deficient number, since it is larger than the sum of its proper divisors (6826249).

40394039 is a wasteful number, since it uses less digits than its factorization.

40394039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 40394039 is about 6355.6304958674. The cubic root of 40394039 is about 343.1145172051.

The spelling of 40394039 in words is "forty million, three hundred ninety-four thousand, thirty-nine".