40891904 has 20 divisors (see below), whose sum is σ = 81704964. Its totient is φ = 20445696.

The previous prime is 40891867. The next prime is 40891931. The reversal of 40891904 is 40919804.

40891904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39422 + ... + 40445.

Almost surely, 2^40891904 is an apocalyptic number.

It is an amenable number.

40891904 is a deficient number, since it is larger than the sum of its proper divisors (40813060).

40891904 is an frugal number, since it uses more digits than its factorization.

40891904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79885 (or 79869 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40891904 is about 6394.6777870351. The cubic root of 40891904 is about 344.5184179042.

The spelling of 40891904 in words is "forty million, eight hundred ninety-one thousand, nine hundred four".