878307640 has 64 divisors (see below), whose sum is σ = 2274854400. Its totient is φ = 298954368.

The previous prime is 878307631. The next prime is 878307653. The reversal of 878307640 is 46703878.

878307640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27637 + ... + 50203.

It is an arithmetic number, because the mean of its divisors is an integer number (35544600).

Almost surely, 2^878307640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878307640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137427200).

878307640 is an abundant number, since it is smaller than the sum of its proper divisors (1396546760).

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

878307640 is a wasteful number, since it uses less digits than its factorization.

878307640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22724 (or 22720 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 878307640 is about 29636.2554989661. The cubic root of 878307640 is about 957.6692736107.

The spelling of 878307640 in words is "eight hundred seventy-eight million, three hundred seven thousand, six hundred forty".