40503891 has 4 divisors (see below), whose sum is σ = 54005192. Its totient is φ = 27002592.

The previous prime is 40503871. The next prime is 40503901. The reversal of 40503891 is 19830504.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40503891 - 2¹¹ = 40501843 is a prime.

It is a super-2 number, since 2×40503891² = 3281130372279762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40503871) 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 3 ways as a sum of consecutive naturals, for example, 6750646 + ... + 6750651.

It is an arithmetic number, because the mean of its divisors is an integer number (13501298).

Almost surely, 2^40503891 is an apocalyptic number.

40503891 is a deficient number, since it is larger than the sum of its proper divisors (13501301).

40503891 is a wasteful number, since it uses less digits than its factorization.

40503891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13501300.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 40503891 is about 6364.2667291684. The cubic root of 40503891 is about 343.4252701499.

The spelling of 40503891 in words is "forty million, five hundred three thousand, eight hundred ninety-one".