87173658 has 160 divisors (see below), whose sum is σ = 237105792. Its totient is φ = 23587200.

The previous prime is 87173641. The next prime is 87173663. The reversal of 87173658 is 85637178.

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 79 ways as a sum of consecutive naturals, for example, 1227763 + ... + 1227833.

Almost surely, 2^87173658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87173658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118552896).

87173658 is an abundant number, since it is smaller than the sum of its proper divisors (149932134).

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

87173658 is a wasteful number, since it uses less digits than its factorization.

87173658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 153 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87173658 is about 9336.6834582736. The cubic root of 87173658 is about 443.3993887793.

It can be divided in two parts, 871 and 73658, that added together give a square (74529 = 273²).

The spelling of 87173658 in words is "eighty-seven million, one hundred seventy-three thousand, six hundred fifty-eight".