87172484 has 48 divisors (see below), whose sum is σ = 183042048. Its totient is φ = 35516448.

The previous prime is 87172483. The next prime is 87172489. The reversal of 87172484 is 48427178.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87172483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143309 + ... + 143915.

It is an arithmetic number, because the mean of its divisors is an integer number (3813376).

Almost surely, 2^87172484 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 87172484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91521024).

87172484 is an abundant number, since it is smaller than the sum of its proper divisors (95869564).

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

87172484 is a wasteful number, since it uses less digits than its factorization.

87172484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 87172484 is about 9336.6205877716. The cubic root of 87172484 is about 443.3973982957.

The spelling of 87172484 in words is "eighty-seven million, one hundred seventy-two thousand, four hundred eighty-four".