87197544 has 96 divisors (see below), whose sum is σ = 278653440. Its totient is φ = 24105600.

The previous prime is 87197533. The next prime is 87197569. The reversal of 87197544 is 44579178.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 87197544.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12834 + ... + 18414.

It is an arithmetic number, because the mean of its divisors is an integer number (2902640).

Almost surely, 2^87197544 is an apocalyptic number.

87197544 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87197544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139326720).

87197544 is an abundant number, since it is smaller than the sum of its proper divisors (191455896).

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

87197544 is a wasteful number, since it uses less digits than its factorization.

87197544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631 (or 5624 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87197544 is about 9337.9625186654. The cubic root of 87197544 is about 443.4398829334.

The spelling of 87197544 in words is "eighty-seven million, one hundred ninety-seven thousand, five hundred forty-four".