40168878 has 16 divisors (see below), whose sum is σ = 80631120. Its totient is φ = 13340736.

The previous prime is 40168871. The next prime is 40168883. The reversal of 40168878 is 87886104.

It is a super-2 number, since 2×40168878² = 3227077519557768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40168871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10423 + ... + 13746.

It is an arithmetic number, because the mean of its divisors is an integer number (5039445).

Almost surely, 2^40168878 is an apocalyptic number.

40168878 is an abundant number, since it is smaller than the sum of its proper divisors (40462242).

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

40168878 is a wasteful number, since it uses less digits than its factorization.

40168878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24451.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 40168878 is about 6337.8922363827. The cubic root of 40168878 is about 342.4758091142.

The spelling of 40168878 in words is "forty million, one hundred sixty-eight thousand, eight hundred seventy-eight".