40068440 has 32 divisors (see below), whose sum is σ = 92076480. Its totient is φ = 15685632.

The previous prime is 40068403. The next prime is 40068449. The reversal of 40068440 is 4486004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40068449) 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, 8777 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (2877390).

Almost surely, 2^40068440 is an apocalyptic number.

40068440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40068440 is an abundant number, since it is smaller than the sum of its proper divisors (52008040).

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

40068440 is a wasteful number, since it uses less digits than its factorization.

40068440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21371 (or 21367 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 40068440 is about 6329.9636649826. The cubic root of 40068440 is about 342.1901294530.

The spelling of 40068440 in words is "forty million, sixty-eight thousand, four hundred forty".