40571988 has 12 divisors (see below), whose sum is σ = 94668000. Its totient is φ = 13523992.

The previous prime is 40571987. The next prime is 40572019. The reversal of 40571988 is 88917504.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40571987) 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, 1690488 + ... + 1690511.

It is an arithmetic number, because the mean of its divisors is an integer number (7889000).

Almost surely, 2^40571988 is an apocalyptic number.

It is an amenable number.

40571988 is an abundant number, since it is smaller than the sum of its proper divisors (54096012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40571988 is a wasteful number, since it uses less digits than its factorization.

40571988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381006 (or 3381004 counting only the distinct ones).

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

The square root of 40571988 is about 6369.6144310311. The cubic root of 40571988 is about 343.6176231665.

The spelling of 40571988 in words is "forty million, five hundred seventy-one thousand, nine hundred eighty-eight".