40396913 has 16 divisors (see below), whose sum is σ = 44945280. Its totient is φ = 36132096.

The previous prime is 40396903. The next prime is 40396921. The reversal of 40396913 is 31969304.

It is a cyclic number.

It is not a de Polignac number, because 40396913 - 2⁴ = 40396897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40396903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32420 + ... + 33642.

It is an arithmetic number, because the mean of its divisors is an integer number (2809080).

Almost surely, 2^40396913 is an apocalyptic number.

It is an amenable number.

40396913 is a deficient number, since it is larger than the sum of its proper divisors (4548367).

40396913 is a wasteful number, since it uses less digits than its factorization.

40396913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 40396913 is about 6355.8565905785. The cubic root of 40396913 is about 343.1226544432.

The spelling of 40396913 in words is "forty million, three hundred ninety-six thousand, nine hundred thirteen".