87744320 has 28 divisors (see below), whose sum is σ = 208941924. Its totient is φ = 35097600.

The previous prime is 87744313. The next prime is 87744323. The reversal of 87744320 is 2344778.

It can be written as a sum of positive squares in 2 ways, for example, as 24127744 + 63616576 = 4912^2 + 7976^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87744323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136781 + ... + 137420.

Almost surely, 2^87744320 is an apocalyptic number.

87744320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87744320 is an abundant number, since it is smaller than the sum of its proper divisors (121197604).

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

87744320 is a wasteful number, since it uses less digits than its factorization.

87744320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274218 (or 274208 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 87744320 is about 9367.1938167201. The cubic root of 87744320 is about 444.3648220328.

The spelling of 87744320 in words is "eighty-seven million, seven hundred forty-four thousand, three hundred twenty".