87128782 has 8 divisors (see below), whose sum is σ = 140746536. Its totient is φ = 40213272.

The previous prime is 87128777. The next prime is 87128803. The reversal of 87128782 is 28782178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675528 + ... + 1675579.

It is an arithmetic number, because the mean of its divisors is an integer number (17593317).

Almost surely, 2^87128782 is an apocalyptic number.

87128782 is a deficient number, since it is larger than the sum of its proper divisors (53617754).

87128782 is a wasteful number, since it uses less digits than its factorization.

87128782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351122.

The product of its digits is 100352, while the sum is 43.

The square root of 87128782 is about 9334.2799400918. The cubic root of 87128782 is about 443.3232900784.

The spelling of 87128782 in words is "eighty-seven million, one hundred twenty-eight thousand, seven hundred eighty-two".