40129608 has 32 divisors (see below), whose sum is σ = 103037760. Its totient is φ = 13014720.

The previous prime is 40129603. The next prime is 40129637. The reversal of 40129608 is 80692104.

It is a super-2 number, since 2×40129608² = 3220770876467328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40129603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21708 + ... + 23483.

It is an arithmetic number, because the mean of its divisors is an integer number (3219930).

Almost surely, 2^40129608 is an apocalyptic number.

It is an amenable number.

40129608 is an abundant number, since it is smaller than the sum of its proper divisors (62908152).

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

40129608 is a wasteful number, since it uses less digits than its factorization.

40129608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45237 (or 45233 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 40129608 is about 6334.7934457250. The cubic root of 40129608 is about 342.3641687037.

The spelling of 40129608 in words is "forty million, one hundred twenty-nine thousand, six hundred eight".