40138008 has 32 divisors (see below), whose sum is σ = 100742400. Its totient is φ = 13326368.

The previous prime is 40137997. The next prime is 40138019. The reversal of 40138008 is 80083104.

It is an interprime number because it is at equal distance from previous prime (40137997) and next prime (40138019).

It is a super-2 number, since 2×40138008² = 3222119372416128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3133 + ... + 9491.

It is an arithmetic number, because the mean of its divisors is an integer number (3148200).

Almost surely, 2^40138008 is an apocalyptic number.

It is an amenable number.

40138008 is an abundant number, since it is smaller than the sum of its proper divisors (60604392).

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

40138008 is a wasteful number, since it uses less digits than its factorization.

40138008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631 (or 6627 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 40138008 is about 6335.4564160761. The cubic root of 40138008 is about 342.3880551267.

It can be divided in two parts, 4013 and 8008, that added together give a palindrome (12021).

The spelling of 40138008 in words is "forty million, one hundred thirty-eight thousand, eight".