40140808 has 16 divisors (see below), whose sum is σ = 79691580. Its totient is φ = 18889728.

The previous prime is 40140803. The next prime is 40140809. The reversal of 40140808 is 80804104.

It can be written as a sum of positive squares in 2 ways, for example, as 36747844 + 3392964 = 6062^2 + 1842^2 .

It is a super-2 number, since 2×40140808² = 3222568933785728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40140803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147441 + ... + 147712.

Almost surely, 2^40140808 is an apocalyptic number.

It is an amenable number.

40140808 is a deficient number, since it is larger than the sum of its proper divisors (39550772).

40140808 is a wasteful number, since it uses less digits than its factorization.

40140808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295176 (or 295172 counting only the distinct ones).

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

The square root of 40140808 is about 6335.6773907768. The cubic root of 40140808 is about 342.3960165272.

It can be divided in two parts, 401 and 40808, that added together give a square (41209 = 203²).

The spelling of 40140808 in words is "forty million, one hundred forty thousand, eight hundred eight".