40181568 has 84 divisors (see below), whose sum is σ = 123700032. Its totient is φ = 11477760.

The previous prime is 40181563. The next prime is 40181587. The reversal of 40181568 is 86518104.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×40181568² = 3229116813877248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40181563) 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 11 ways as a sum of consecutive naturals, for example, 7273 + ... + 11543.

Almost surely, 2^40181568 is an apocalyptic number.

40181568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40181568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61850016).

40181568 is an abundant number, since it is smaller than the sum of its proper divisors (83518464).

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

40181568 is a wasteful number, since it uses less digits than its factorization.

40181568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4283 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 40181568 is about 6338.8932787988. The cubic root of 40181568 is about 342.5118698712.

The spelling of 40181568 in words is "forty million, one hundred eighty-one thousand, five hundred sixty-eight".