40408988 has 12 divisors (see below), whose sum is σ = 70762272. Its totient is φ = 20191200.

The previous prime is 40408981. The next prime is 40408993. The reversal of 40408988 is 88980404.

40408988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40408988² = 3265772622368288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408981) 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 3 ways as a sum of consecutive naturals, for example, 7256 + ... + 11552.

It is an arithmetic number, because the mean of its divisors is an integer number (5896856).

Almost surely, 2^40408988 is an apocalyptic number.

It is an amenable number.

40408988 is a deficient number, since it is larger than the sum of its proper divisors (30353284).

40408988 is a wasteful number, since it uses less digits than its factorization.

40408988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652 (or 6650 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 40408988 is about 6356.8064309054. The cubic root of 40408988 is about 343.1568385182.

The spelling of 40408988 in words is "forty million, four hundred eight thousand, nine hundred eighty-eight".