40091580 has 36 divisors (see below), whose sum is σ = 121611672. Its totient is φ = 10691040.

The previous prime is 40091561. The next prime is 40091581. The reversal of 40091580 is 8519004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40091581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111186 + ... + 111545.

It is an arithmetic number, because the mean of its divisors is an integer number (3378102).

Almost surely, 2^40091580 is an apocalyptic number.

It is an amenable number.

40091580 is an abundant number, since it is smaller than the sum of its proper divisors (81520092).

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

40091580 is a wasteful number, since it uses less digits than its factorization.

40091580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222746 (or 222741 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 40091580 is about 6331.7912157619. The cubic root of 40091580 is about 342.2559897310.

The spelling of 40091580 in words is "forty million, ninety-one thousand, five hundred eighty".