40303791 has 32 divisors (see below), whose sum is σ = 65856000. Its totient is φ = 24157440.

The previous prime is 40303763. The next prime is 40303793. The reversal of 40303791 is 19730304.

It is not a de Polignac number, because 40303791 - 2⁵ = 40303759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40303793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28110 + ... + 29508.

It is an arithmetic number, because the mean of its divisors is an integer number (2058000).

Almost surely, 2^40303791 is an apocalyptic number.

40303791 is a deficient number, since it is larger than the sum of its proper divisors (25552209).

40303791 is a wasteful number, since it uses less digits than its factorization.

40303791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 40303791 is about 6348.5266794745. The cubic root of 40303791 is about 342.8587988759.

The spelling of 40303791 in words is "forty million, three hundred three thousand, seven hundred ninety-one".