40398178 has 8 divisors (see below), whose sum is σ = 61133868. Its totient is φ = 20020224.

The previous prime is 40398167. The next prime is 40398179. The reversal of 40398178 is 87189304.

It can be written as a sum of positive squares in 2 ways, for example, as 26759929 + 13638249 = 5173^2 + 3693^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 40398178.

It is not an unprimeable number, because it can be changed into a prime (40398179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89151 + ... + 89602.

Almost surely, 2^40398178 is an apocalyptic number.

40398178 is a deficient number, since it is larger than the sum of its proper divisors (20735690).

40398178 is a wasteful number, since it uses less digits than its factorization.

40398178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178868.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 40398178 is about 6355.9561043166. The cubic root of 40398178 is about 343.1262359514.

The spelling of 40398178 in words is "forty million, three hundred ninety-eight thousand, one hundred seventy-eight".