87986770 has 16 divisors (see below), whose sum is σ = 159200280. Its totient is φ = 35011584.

The previous prime is 87986749. The next prime is 87986771. The reversal of 87986770 is 7768978.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47320641 + 40666129 = 6879^2 + 6377^2 .

It is not an unprimeable number, because it can be changed into a prime (87986771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20865 + ... + 24724.

Almost surely, 2^87986770 is an apocalyptic number.

87986770 is a deficient number, since it is larger than the sum of its proper divisors (71213510).

87986770 is a wasteful number, since it uses less digits than its factorization.

87986770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45789.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 87986770 is about 9380.1263317719. The cubic root of 87986770 is about 444.7737266508.

The spelling of 87986770 in words is "eighty-seven million, nine hundred eighty-six thousand, seven hundred seventy".