40316991 has 16 divisors (see below), whose sum is σ = 63154560. Its totient is φ = 22554720.

The previous prime is 40316971. The next prime is 40317007. The reversal of 40316991 is 19961304.

It is not a de Polignac number, because 40316991 - 2⁷ = 40316863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40316971) 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, 46561 + ... + 47418.

It is an arithmetic number, because the mean of its divisors is an integer number (3947160).

Almost surely, 2^40316991 is an apocalyptic number.

40316991 is a deficient number, since it is larger than the sum of its proper divisors (22837569).

40316991 is a wasteful number, since it uses less digits than its factorization.

40316991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94006.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 40316991 is about 6349.5662056553. The cubic root of 40316991 is about 342.8962249844.

The spelling of 40316991 in words is "forty million, three hundred sixteen thousand, nine hundred ninety-one".