87169998 has 16 divisors (see below), whose sum is σ = 180352080. Its totient is φ = 28054656.

The previous prime is 87169993. The next prime is 87170009. The reversal of 87169998 is 89996178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87169991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250315 + ... + 250662.

It is an arithmetic number, because the mean of its divisors is an integer number (11272005).

Almost surely, 2^87169998 is an apocalyptic number.

87169998 is an abundant number, since it is smaller than the sum of its proper divisors (93182082).

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

87169998 is a wasteful number, since it uses less digits than its factorization.

87169998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501011.

The product of its digits is 1959552, while the sum is 57.

The square root of 87169998 is about 9336.4874551407. The cubic root of 87169998 is about 443.3931832943.

The spelling of 87169998 in words is "eighty-seven million, one hundred sixty-nine thousand, nine hundred ninety-eight".