40581897 has 16 divisors (see below), whose sum is σ = 55555968. Its totient is φ = 26340480.

The previous prime is 40581887. The next prime is 40581949. The reversal of 40581897 is 79818504.

40581897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40581897 - 2⁷ = 40581769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40581857) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 17773 + ... + 19925.

It is an arithmetic number, because the mean of its divisors is an integer number (3472248).

Almost surely, 2^40581897 is an apocalyptic number.

It is an amenable number.

40581897 is a deficient number, since it is larger than the sum of its proper divisors (14974071).

40581897 is a wasteful number, since it uses less digits than its factorization.

40581897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 40581897 is about 6370.3922171245. The cubic root of 40581897 is about 343.6455950919.

The spelling of 40581897 in words is "forty million, five hundred eighty-one thousand, eight hundred ninety-seven".