40790391 has 16 divisors (see below), whose sum is σ = 56498400. Its totient is φ = 26155008.

The previous prime is 40790383. The next prime is 40790441. The reversal of 40790391 is 19309704.

It is not a de Polignac number, because 40790391 - 2³ = 40790383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40790291) 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, 7815 + ... + 11943.

It is an arithmetic number, because the mean of its divisors is an integer number (3531150).

Almost surely, 2^40790391 is an apocalyptic number.

40790391 is a deficient number, since it is larger than the sum of its proper divisors (15708009).

40790391 is a wasteful number, since it uses less digits than its factorization.

40790391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 40790391 is about 6386.7355511247. The cubic root of 40790391 is about 344.2330959160.

The spelling of 40790391 in words is "forty million, seven hundred ninety thousand, three hundred ninety-one".