878787440 has 80 divisors (see below), whose sum is σ = 2112427296. Its totient is φ = 339763200.

The previous prime is 878787439. The next prime is 878787521. The reversal of 878787440 is 44787878.

It is a tau number, because it is divible by the number of its divisors (80).

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, 369455 + ... + 371825.

Almost surely, 2^878787440 is an apocalyptic number.

878787440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878787440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056213648).

878787440 is an abundant number, since it is smaller than the sum of its proper divisors (1233639856).

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

878787440 is a wasteful number, since it uses less digits than its factorization.

878787440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 53.

The square root of 878787440 is about 29644.3492085760. The cubic root of 878787440 is about 957.8436263668.

The spelling of 878787440 in words is "eight hundred seventy-eight million, seven hundred eighty-seven thousand, four hundred forty".