87747072 has 80 divisors (see below), whose sum is σ = 267191232. Its totient is φ = 25067520.

The previous prime is 87747067. The next prime is 87747113. The reversal of 87747072 is 27074778.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6672 + ... + 14832.

Almost surely, 2^87747072 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 87747072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133595616).

87747072 is an abundant number, since it is smaller than the sum of its proper divisors (179444160).

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

87747072 is an equidigital number, since it uses as much as digits as its factorization.

87747072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189 (or 8173 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 42.

The square root of 87747072 is about 9367.3407112158. The cubic root of 87747072 is about 444.3694676486.

The spelling of 87747072 in words is "eighty-seven million, seven hundred forty-seven thousand, seventy-two".