40681865 has 8 divisors (see below), whose sum is σ = 55792320. Its totient is φ = 27896112.

The previous prime is 40681859. The next prime is 40681873. The reversal of 40681865 is 56818604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40681865 - 2⁶ = 40681801 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 581135 + ... + 581204.

It is an arithmetic number, because the mean of its divisors is an integer number (6974040).

Almost surely, 2^40681865 is an apocalyptic number.

It is an amenable number.

40681865 is a deficient number, since it is larger than the sum of its proper divisors (15110455).

40681865 is a wasteful number, since it uses less digits than its factorization.

40681865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162351.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 40681865 is about 6378.2336896668. The cubic root of 40681865 is about 343.9275384828.

The spelling of 40681865 in words is "forty million, six hundred eighty-one thousand, eight hundred sixty-five".