87947424 has 96 divisors (see below), whose sum is σ = 258733440. Its totient is φ = 29062656.

The previous prime is 87947417. The next prime is 87947441. The reversal of 87947424 is 42474978.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 87947424.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117997 + ... + 118739.

It is an arithmetic number, because the mean of its divisors is an integer number (2695140).

Almost surely, 2^87947424 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 87947424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129366720).

87947424 is an abundant number, since it is smaller than the sum of its proper divisors (170786016).

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

87947424 is a wasteful number, since it uses less digits than its factorization.

87947424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 885 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 87947424 is about 9378.0287907428. The cubic root of 87947424 is about 444.7074186659.

The spelling of 87947424 in words is "eighty-seven million, nine hundred forty-seven thousand, four hundred twenty-four".