87443424 has 144 divisors (see below), whose sum is σ = 266378112. Its totient is φ = 27143424.

The previous prime is 87443423. The next prime is 87443449. The reversal of 87443424 is 42434478.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87443423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284679 + ... + 284985.

It is an arithmetic number, because the mean of its divisors is an integer number (1849848).

Almost surely, 2^87443424 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 87443424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133189056).

87443424 is an abundant number, since it is smaller than the sum of its proper divisors (178934688).

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

87443424 is a wasteful number, since it uses less digits than its factorization.

87443424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 378 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 87443424 is about 9351.1188635371. The cubic root of 87443424 is about 443.8562963236.

The spelling of 87443424 in words is "eighty-seven million, four hundred forty-three thousand, four hundred twenty-four".