87173928 has 64 divisors (see below), whose sum is σ = 243532800. Its totient is φ = 28892160.

The previous prime is 87173917. The next prime is 87173929. The reversal of 87173928 is 82937178.

It is not an unprimeable number, because it can be changed into a prime (87173929) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 40200 + ... + 42312.

It is an arithmetic number, because the mean of its divisors is an integer number (3805200).

Almost surely, 2^87173928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87173928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121766400).

87173928 is an abundant number, since it is smaller than the sum of its proper divisors (156358872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87173928 is a wasteful number, since it uses less digits than its factorization.

87173928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2309 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 87173928 is about 9336.6979173581. The cubic root of 87173928 is about 443.3998465541.

It can be divided in two parts, 8717392 and 8, that added together give a triangular number (8717400 = T₄₁₇₅).

The spelling of 87173928 in words is "eighty-seven million, one hundred seventy-three thousand, nine hundred twenty-eight".