40312878 has 16 divisors (see below), whose sum is σ = 80928720. Its totient is φ = 13387136.

The previous prime is 40312873. The next prime is 40312879. The reversal of 40312878 is 87821304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40312873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10875 + ... + 14102.

It is an arithmetic number, because the mean of its divisors is an integer number (5058045).

Almost surely, 2^40312878 is an apocalyptic number.

40312878 is an abundant number, since it is smaller than the sum of its proper divisors (40615842).

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

40312878 is a wasteful number, since it uses less digits than its factorization.

40312878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25251.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 40312878 is about 6349.2423170013. The cubic root of 40312878 is about 342.8845642255.

The spelling of 40312878 in words is "forty million, three hundred twelve thousand, eight hundred seventy-eight".