40391304 has 32 divisors (see below), whose sum is σ = 101502720. Its totient is φ = 13393856.

The previous prime is 40391257. The next prime is 40391311. The reversal of 40391304 is 40319304.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457 + ... + 8999.

It is an arithmetic number, because the mean of its divisors is an integer number (3171960).

Almost surely, 2^40391304 is an apocalyptic number.

It is an amenable number.

40391304 is an abundant number, since it is smaller than the sum of its proper divisors (61111416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40391304 is a wasteful number, since it uses less digits than its factorization.

40391304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749 (or 8745 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 40391304 is about 6355.4153286784. The cubic root of 40391304 is about 343.1067731633.

The spelling of 40391304 in words is "forty million, three hundred ninety-one thousand, three hundred four".