87161800 has 48 divisors (see below), whose sum is σ = 221079600. Its totient is φ = 31694400.

The previous prime is 87161783. The next prime is 87161803. The reversal of 87161800 is 816178.

It is not an unprimeable number, because it can be changed into a prime (87161803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17610 + ... + 22009.

It is an arithmetic number, because the mean of its divisors is an integer number (4605825).

Almost surely, 2^87161800 is an apocalyptic number.

It is an amenable number.

87161800 is an abundant number, since it is smaller than the sum of its proper divisors (133917800).

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

87161800 is a wasteful number, since it uses less digits than its factorization.

87161800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39646 (or 39637 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 87161800 is about 9336.0484146131. The cubic root of 87161800 is about 443.3792830559.

Adding to 87161800 its reverse (816178), we get a palindrome (87977978).

The spelling of 87161800 in words is "eighty-seven million, one hundred sixty-one thousand, eight hundred".