40091328 has 56 divisors (see below), whose sum is σ = 117866160. Its totient is φ = 13363200.

The previous prime is 40091327. The next prime is 40091333. The reversal of 40091328 is 82319004.

40091328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40091327) 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 7 ways as a sum of consecutive naturals, for example, 9873 + ... + 13328.

Almost surely, 2^40091328 is an apocalyptic number.

40091328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40091328 is an abundant number, since it is smaller than the sum of its proper divisors (77774832).

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

40091328 is a wasteful number, since it uses less digits than its factorization.

40091328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23222 (or 23206 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 40091328 is about 6331.7713161484. The cubic root of 40091328 is about 342.2552726337.

The spelling of 40091328 in words is "forty million, ninety-one thousand, three hundred twenty-eight".