40878218 has 8 divisors (see below), whose sum is σ = 61534848. Its totient is φ = 20366604.

The previous prime is 40878143. The next prime is 40878221. The reversal of 40878218 is 81287804.

It is a happy number.

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, 35546 + ... + 36677.

It is an arithmetic number, because the mean of its divisors is an integer number (7691856).

Almost surely, 2^40878218 is an apocalyptic number.

40878218 is a deficient number, since it is larger than the sum of its proper divisors (20656630).

40878218 is a wasteful number, since it uses less digits than its factorization.

40878218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72508.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 40878218 is about 6393.6075888343. The cubic root of 40878218 is about 344.4799783050.

The spelling of 40878218 in words is "forty million, eight hundred seventy-eight thousand, two hundred eighteen".