801139878 has 192 divisors, whose sum is σ = 2245501440. Its totient is φ = 200448000.

The previous prime is 801139861. The next prime is 801139897. The reversal of 801139878 is 878931108.

801139878 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 95 ways as a sum of consecutive naturals, for example, 7932028 + ... + 7932128.

It is an arithmetic number, because the mean of its divisors is an integer number (11695320).

Almost surely, 2^801139878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 801139878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122750720).

801139878 is an abundant number, since it is smaller than the sum of its proper divisors (1444361562).

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

801139878 is a wasteful number, since it uses less digits than its factorization.

801139878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 801139878 is about 28304.4144613521. The cubic root of 801139878 is about 928.7584612310.

The spelling of 801139878 in words is "eight hundred one million, one hundred thirty-nine thousand, eight hundred seventy-eight".