878761820 has 24 divisors (see below), whose sum is σ = 1884665664. Its totient is φ = 344025536.

The previous prime is 878761771. The next prime is 878761879. The reversal of 878761820 is 28167878.

It is a happy number.

878761820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466487 + ... + 468366.

It is an arithmetic number, because the mean of its divisors is an integer number (78527736).

Almost surely, 2^878761820 is an apocalyptic number.

It is an amenable number.

878761820 is an abundant number, since it is smaller than the sum of its proper divisors (1005903844).

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

878761820 is a wasteful number, since it uses less digits than its factorization.

878761820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934909 (or 934907 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The square root of 878761820 is about 29643.9170825989. The cubic root of 878761820 is about 957.8343180134.

It can be divided in two parts, 8787 and 61820, that added together give a palindrome (70607).

The spelling of 878761820 in words is "eight hundred seventy-eight million, seven hundred sixty-one thousand, eight hundred twenty".