87944320 has 32 divisors (see below), whose sum is σ = 210243420. Its totient is φ = 35177472.

The previous prime is 87944317. The next prime is 87944321. The reversal of 87944320 is 2344978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87459904 + 484416 = 9352^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 87944320.

It is not an unprimeable number, because it can be changed into a prime (87944321) 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 3 ways as a sum of consecutive naturals, for example, 68067 + ... + 69346.

Almost surely, 2^87944320 is an apocalyptic number.

87944320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87944320 is an abundant number, since it is smaller than the sum of its proper divisors (122299100).

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

87944320 is a wasteful number, since it uses less digits than its factorization.

87944320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137432 (or 137420 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 87944320 is about 9377.8632960819. The cubic root of 87944320 is about 444.7021867974.

The spelling of 87944320 in words is "eighty-seven million, nine hundred forty-four thousand, three hundred twenty".