40089878 has 4 divisors (see below), whose sum is σ = 60134820. Its totient is φ = 20044938.

The previous prime is 40089869. The next prime is 40089883. The reversal of 40089878 is 87898004.

It is a happy number.

40089878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022468 + ... + 10022471.

It is an arithmetic number, because the mean of its divisors is an integer number (15033705).

Almost surely, 2^40089878 is an apocalyptic number.

40089878 is a deficient number, since it is larger than the sum of its proper divisors (20044942).

40089878 is a wasteful number, since it uses less digits than its factorization.

40089878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20044941.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 40089878 is about 6331.6568131888. The cubic root of 40089878 is about 342.2511464203.

The spelling of 40089878 in words is "forty million, eighty-nine thousand, eight hundred seventy-eight".