87147828 has 36 divisors (see below), whose sum is σ = 229870368. Its totient is φ = 27786000.

The previous prime is 87147817. The next prime is 87147829. The reversal of 87147828 is 82874178.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87147829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51798 + ... + 53453.

It is an arithmetic number, because the mean of its divisors is an integer number (6385288).

Almost surely, 2^87147828 is an apocalyptic number.

It is an amenable number.

87147828 is an abundant number, since it is smaller than the sum of its proper divisors (142722540).

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

87147828 is a wasteful number, since it uses less digits than its factorization.

87147828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105284 (or 105279 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 87147828 is about 9335.3001022999. The cubic root of 87147828 is about 443.3555906188.

The spelling of 87147828 in words is "eighty-seven million, one hundred forty-seven thousand, eight hundred twenty-eight".