40109872 has 40 divisors (see below), whose sum is σ = 85150800. Its totient is φ = 18151680.

The previous prime is 40109863. The next prime is 40109891. The reversal of 40109872 is 27890104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61098 + ... + 61750.

It is an arithmetic number, because the mean of its divisors is an integer number (2128770).

Almost surely, 2^40109872 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 40109872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42575400).

40109872 is an abundant number, since it is smaller than the sum of its proper divisors (45040928).

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

40109872 is a wasteful number, since it uses less digits than its factorization.

40109872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40109872 is about 6333.2355080164. The cubic root of 40109872 is about 342.3080338648.

Adding to 40109872 its reverse (27890104), we get a palindrome (67999976).

The spelling of 40109872 in words is "forty million, one hundred nine thousand, eight hundred seventy-two".