40091408 has 30 divisors (see below), whose sum is σ = 90360846. Its totient is φ = 17181696.

The previous prime is 40091377. The next prime is 40091413. The reversal of 40091408 is 80419004.

40091408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 753424 = 6272^2 + 868^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

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 in 5 ways as a sum of consecutive naturals, for example, 24785 + ... + 26352.

Almost surely, 2^40091408 is an apocalyptic number.

It is an amenable number.

40091408 is an abundant number, since it is smaller than the sum of its proper divisors (50269438).

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

40091408 is a wasteful number, since it uses less digits than its factorization.

40091408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51159 (or 51146 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 40091408 is about 6331.7776334928. Note that the first 3 decimals coincide. The cubic root of 40091408 is about 342.2555002839.

The spelling of 40091408 in words is "forty million, ninety-one thousand, four hundred eight".