87680786 has 4 divisors (see below), whose sum is σ = 131521182. Its totient is φ = 43840392.

The previous prime is 87680771. The next prime is 87680809. The reversal of 87680786 is 68708678.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 4305625 = 9131^2 + 2075^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21920195 + ... + 21920198.

Almost surely, 2^87680786 is an apocalyptic number.

87680786 is a deficient number, since it is larger than the sum of its proper divisors (43840396).

87680786 is a wasteful number, since it uses less digits than its factorization.

87680786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43840395.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 87680786 is about 9363.8018988016. The cubic root of 87680786 is about 444.2575440859.

The spelling of 87680786 in words is "eighty-seven million, six hundred eighty thousand, seven hundred eighty-six".