87198012 has 96 divisors (see below), whose sum is σ = 255225600. Its totient is φ = 25502400.

The previous prime is 87197969. The next prime is 87198029. The reversal of 87198012 is 21089178.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33187 + ... + 35717.

It is an arithmetic number, because the mean of its divisors is an integer number (2658600).

Almost surely, 2^87198012 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 87198012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127612800).

87198012 is an abundant number, since it is smaller than the sum of its proper divisors (168027588).

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

87198012 is a wasteful number, since it uses less digits than its factorization.

87198012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 87198012 is about 9337.9875776315. The cubic root of 87198012 is about 443.4406762642.

The spelling of 87198012 in words is "eighty-seven million, one hundred ninety-eight thousand, twelve".