40391337 has 32 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 21713664.

The previous prime is 40391327. The next prime is 40391339. The reversal of 40391337 is 73319304.

It is not a de Polignac number, because 40391337 - 2⁸ = 40391081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40391339) 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 31 ways as a sum of consecutive naturals, for example, 16339 + ... + 18647.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^40391337 is an apocalyptic number.

It is an amenable number.

40391337 is a deficient number, since it is larger than the sum of its proper divisors (26136663).

40391337 is a wasteful number, since it uses less digits than its factorization.

40391337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 40391337 is about 6355.4179248890. The cubic root of 40391337 is about 343.1068666035.

The spelling of 40391337 in words is "forty million, three hundred ninety-one thousand, three hundred thirty-seven".