87171928 has 32 divisors (see below), whose sum is σ = 168471360. Its totient is φ = 42266880.

The previous prime is 87171893. The next prime is 87171947. The reversal of 87171928 is 82917178.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34401 + ... + 36847.

It is an arithmetic number, because the mean of its divisors is an integer number (5264730).

Almost surely, 2^87171928 is an apocalyptic number.

It is an amenable number.

87171928 is a deficient number, since it is larger than the sum of its proper divisors (81299432).

87171928 is a wasteful number, since it uses less digits than its factorization.

87171928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587 (or 2583 counting only the distinct ones).

The product of its digits is 56448, while the sum is 43.

The square root of 87171928 is about 9336.5908124968. The cubic root of 87171928 is about 443.3964556072.

The spelling of 87171928 in words is "eighty-seven million, one hundred seventy-one thousand, nine hundred twenty-eight".