40991408 has 10 divisors (see below), whose sum is σ = 79420884. Its totient is φ = 20495696.

The previous prime is 40991407. The next prime is 40991411. The reversal of 40991408 is 80419904.

40991408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (40991407) 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 as a sum of consecutive naturals, namely, 1280966 + ... + 1280997.

Almost surely, 2^40991408 is an apocalyptic number.

It is an amenable number.

40991408 is a deficient number, since it is larger than the sum of its proper divisors (38429476).

40991408 is a wasteful number, since it uses less digits than its factorization.

40991408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561971 (or 2561965 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40991408 is about 6402.4532797983. The cubic root of 40991408 is about 344.7976352965.

The spelling of 40991408 in words is "forty million, nine hundred ninety-one thousand, four hundred eight".