40081408 has 24 divisors (see below), whose sum is σ = 80147340. Its totient is φ = 20039680.

The previous prime is 40081399. The next prime is 40081411. The reversal of 40081408 is 80418004.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7738 + ... + 11833.

Almost surely, 2^40081408 is an apocalyptic number.

It is an amenable number.

40081408 is a deficient number, since it is larger than the sum of its proper divisors (40065932).

40081408 is an equidigital number, since it uses as much as digits as its factorization.

40081408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19593 (or 19573 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 40081408 is about 6330.9879165893. The cubic root of 40081408 is about 342.2270416542.

The spelling of 40081408 in words is "forty million, eighty-one thousand, four hundred eight".