40128808 has 16 divisors (see below), whose sum is σ = 77836500. Its totient is φ = 19372416.

The previous prime is 40128799. The next prime is 40128811. The reversal of 40128808 is 80882104.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 3912484 = 6018^2 + 1978^2 .

It is a super-2 number, since 2×40128808² = 3220642463001728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40128808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86253 + ... + 86716.

Almost surely, 2^40128808 is an apocalyptic number.

It is an amenable number.

40128808 is a deficient number, since it is larger than the sum of its proper divisors (37707692).

40128808 is a wasteful number, since it uses less digits than its factorization.

40128808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173004 (or 173000 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 40128808 is about 6334.7303020729. The cubic root of 40128808 is about 342.3618936324.

The spelling of 40128808 in words is "forty million, one hundred twenty-eight thousand, eight hundred eight".