40793891 has 4 divisors (see below), whose sum is σ = 40903632. Its totient is φ = 40684152.

The previous prime is 40793887. The next prime is 40793899. The reversal of 40793891 is 19839704.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40793891 - 2² = 40793887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40793899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54311 + ... + 55056.

It is an arithmetic number, because the mean of its divisors is an integer number (10225908).

Almost surely, 2^40793891 is an apocalyptic number.

40793891 is a deficient number, since it is larger than the sum of its proper divisors (109741).

40793891 is a wasteful number, since it uses less digits than its factorization.

40793891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109740.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 40793891 is about 6387.0095506426. The cubic root of 40793891 is about 344.2429412198.

The spelling of 40793891 in words is "forty million, seven hundred ninety-three thousand, eight hundred ninety-one".