878638788 has 36 divisors (see below), whose sum is σ = 2226317548. Its totient is φ = 292178880.

The previous prime is 878638777. The next prime is 878638811. The reversal of 878638788 is 887836878.

It can be written as a sum of positive squares in 2 ways, for example, as 39841344 + 838797444 = 6312^2 + 28962^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×878638788² = 1544012239556217888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13831 + ... + 44142.

Almost surely, 2^878638788 is an apocalyptic number.

It is an amenable number.

878638788 is an abundant number, since it is smaller than the sum of its proper divisors (1347678760).

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

878638788 is a wasteful number, since it uses less digits than its factorization.

878638788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58404 (or 58399 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 63.

The square root of 878638788 is about 29641.8418456074. The cubic root of 878638788 is about 957.7896150502.

It can be divided in two parts, 8786 and 38788, that added together give a palindrome (47574).

The spelling of 878638788 in words is "eight hundred seventy-eight million, six hundred thirty-eight thousand, seven hundred eighty-eight".