87827778 has 24 divisors (see below), whose sum is σ = 192589488. Its totient is φ = 28922712.

The previous prime is 87827759. The next prime is 87827783. The reversal of 87827778 is 87772878.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27900 + ... + 30887.

It is an arithmetic number, because the mean of its divisors is an integer number (8024562).

Almost surely, 2^87827778 is an apocalyptic number.

87827778 is an abundant number, since it is smaller than the sum of its proper divisors (104761710).

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

87827778 is a wasteful number, since it uses less digits than its factorization.

87827778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58878 (or 58875 counting only the distinct ones).

The product of its digits is 2458624, while the sum is 54.

The square root of 87827778 is about 9371.6475605947. The cubic root of 87827778 is about 444.5056632385.

The spelling of 87827778 in words is "eighty-seven million, eight hundred twenty-seven thousand, seven hundred seventy-eight".