87163398 has 64 divisors (see below), whose sum is σ = 222405120. Its totient is φ = 24787296.

The previous prime is 87163397. The next prime is 87163421. The reversal of 87163398 is 89336178.

It is a happy number.

87163398 is a `hidden beast` number, since 8 + 7 + 1 + 633 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87163397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110361 + ... + 111147.

It is an arithmetic number, because the mean of its divisors is an integer number (3475080).

Almost surely, 2^87163398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87163398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111202560).

87163398 is an abundant number, since it is smaller than the sum of its proper divisors (135241722).

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

87163398 is a wasteful number, since it uses less digits than its factorization.

87163398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1092 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 87163398 is about 9336.1339964677. The cubic root of 87163398 is about 443.3819926365.

The spelling of 87163398 in words is "eighty-seven million, one hundred sixty-three thousand, three hundred ninety-eight".