878920086 has 64 divisors (see below), whose sum is σ = 1994800896. Its totient is φ = 255830400.

The previous prime is 878920067. The next prime is 878920103. The reversal of 878920086 is 680029878.

It is a happy number.

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 in 31 ways as a sum of consecutive naturals, for example, 170580 + ... + 175656.

It is an arithmetic number, because the mean of its divisors is an integer number (31168764).

Almost surely, 2^878920086 is an apocalyptic number.

878920086 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 878920086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997400448).

878920086 is an abundant number, since it is smaller than the sum of its proper divisors (1115880810).

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

878920086 is a wasteful number, since it uses less digits than its factorization.

878920086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 878920086 is about 29646.5864139533. The cubic root of 878920086 is about 957.8918169105.

The spelling of 878920086 in words is "eight hundred seventy-eight million, nine hundred twenty thousand, eighty-six".