40865978 has 8 divisors (see below), whose sum is σ = 61620480. Its totient is φ = 20325820.

The previous prime is 40865947. The next prime is 40866037. The reversal of 40865978 is 87956804.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53108 + ... + 53871.

It is an arithmetic number, because the mean of its divisors is an integer number (7702560).

Almost surely, 2^40865978 is an apocalyptic number.

40865978 is a deficient number, since it is larger than the sum of its proper divisors (20754502).

40865978 is a wasteful number, since it uses less digits than its factorization.

40865978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107172.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 40865978 is about 6392.6503110995. The cubic root of 40865978 is about 344.4455927892.

The spelling of 40865978 in words is "forty million, eight hundred sixty-five thousand, nine hundred seventy-eight".