87977786 has 16 divisors (see below), whose sum is σ = 145960584. Its totient is φ = 39507264.

The previous prime is 87977779. The next prime is 87977789. The reversal of 87977786 is 68777978.

It can be written as a sum of positive squares in 4 ways, for example, as 70879561 + 17098225 = 8419^2 + 4135^2 .

It is not an unprimeable number, because it can be changed into a prime (87977789) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44765 + ... + 46688.

Almost surely, 2^87977786 is an apocalyptic number.

87977786 is a deficient number, since it is larger than the sum of its proper divisors (57982798).

87977786 is a wasteful number, since it uses less digits than its factorization.

87977786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91505.

The product of its digits is 8297856, while the sum is 59.

The square root of 87977786 is about 9379.6474347387. The cubic root of 87977786 is about 444.7585880750.

The spelling of 87977786 in words is "eighty-seven million, nine hundred seventy-seven thousand, seven hundred eighty-six".