87172808 has 12 divisors (see below), whose sum is σ = 163498545. Its totient is φ = 43573200.

The previous prime is 87172769. The next prime is 87172819. The reversal of 87172808 is 80827178.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 78889924 + 8282884 = 8882^2 + 2878^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6602.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 24758 + ... + 28058.

Almost surely, 2^87172808 is an apocalyptic number.

It is an amenable number.

87172808 is a deficient number, since it is larger than the sum of its proper divisors (76325737).

87172808 is an frugal number, since it uses more digits than its factorization.

87172808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608 (or 3303 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 87172808 is about 9336.6379387872. The cubic root of 87172808 is about 443.3979476302.

The spelling of 87172808 in words is "eighty-seven million, one hundred seventy-two thousand, eight hundred eight".