40128336 has 60 divisors (see below), whose sum is σ = 112968960. Its totient is φ = 13296960.

The previous prime is 40128311. The next prime is 40128349. The reversal of 40128336 is 63382104.

It is a happy number.

It is a super-2 number, since 2×40128336² = 3220566700257792, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 26775 + ... + 28233.

It is an arithmetic number, because the mean of its divisors is an integer number (1882816).

Almost surely, 2^40128336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40128336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56484480).

40128336 is an abundant number, since it is smaller than the sum of its proper divisors (72840624).

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

40128336 is a wasteful number, since it uses less digits than its factorization.

40128336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40128336 is about 6334.6930470229. The cubic root of 40128336 is about 342.3605513262.

The spelling of 40128336 in words is "forty million, one hundred twenty-eight thousand, three hundred thirty-six".