87128768 has 14 divisors (see below), whose sum is σ = 172896276. Its totient is φ = 43564352.

The previous prime is 87128753. The next prime is 87128771. The reversal of 87128768 is 86782178.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680630 + ... + 680757.

It is an arithmetic number, because the mean of its divisors is an integer number (12349734).

Almost surely, 2^87128768 is an apocalyptic number.

It is an amenable number.

87128768 is a deficient number, since it is larger than the sum of its proper divisors (85767508).

87128768 is a wasteful number, since it uses less digits than its factorization.

87128768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361399 (or 1361389 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The square root of 87128768 is about 9334.2791901678. The cubic root of 87128768 is about 443.3232663338.

The spelling of 87128768 in words is "eighty-seven million, one hundred twenty-eight thousand, seven hundred sixty-eight".