87381444 has 12 divisors (see below), whose sum is σ = 203890064. Its totient is φ = 29127144.

The previous prime is 87381421. The next prime is 87381451. The reversal of 87381444 is 44418378.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3640882 + ... + 3640905.

Almost surely, 2^87381444 is an apocalyptic number.

It is an amenable number.

87381444 is an abundant number, since it is smaller than the sum of its proper divisors (116508620).

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

87381444 is a wasteful number, since it uses less digits than its factorization.

87381444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7281794 (or 7281792 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 87381444 is about 9347.8042341504. The cubic root of 87381444 is about 443.7514029183.

The spelling of 87381444 in words is "eighty-seven million, three hundred eighty-one thousand, four hundred forty-four".