40421808 has 80 divisors (see below), whose sum is σ = 132610560. Its totient is φ = 11548224.

The previous prime is 40421789. The next prime is 40421809. The reversal of 40421808 is 80812404.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40421809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3660 + ... + 9707.

It is an arithmetic number, because the mean of its divisors is an integer number (1657632).

Almost surely, 2^40421808 is an apocalyptic number.

40421808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40421808 is an abundant number, since it is smaller than the sum of its proper divisors (92188752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40421808 is a wasteful number, since it uses less digits than its factorization.

40421808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13391 (or 13379 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 40421808 is about 6357.8147189109. The cubic root of 40421808 is about 343.1931242204.

The spelling of 40421808 in words is "forty million, four hundred twenty-one thousand, eight hundred eight".