40781608 has 32 divisors (see below), whose sum is σ = 87595200. Its totient is φ = 17436672.

The previous prime is 40781597. The next prime is 40781633. The reversal of 40781608 is 80618704.

It is a happy number.

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, 42591 + ... + 43537.

It is an arithmetic number, because the mean of its divisors is an integer number (2737350).

Almost surely, 2^40781608 is an apocalyptic number.

It is an amenable number.

40781608 is an abundant number, since it is smaller than the sum of its proper divisors (46813592).

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

40781608 is a wasteful number, since it uses less digits than its factorization.

40781608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 40781608 is about 6386.0479171394. The cubic root of 40781608 is about 344.2083873492.

The spelling of 40781608 in words is "forty million, seven hundred eighty-one thousand, six hundred eight".