87049728 has 100 divisors (see below), whose sum is σ = 259944300. Its totient is φ = 29002752.

The previous prime is 87049727. The next prime is 87049747. The reversal of 87049728 is 82794078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87049727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40423 + ... + 42521.

It is an arithmetic number, because the mean of its divisors is an integer number (2599443).

Almost surely, 2^87049728 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 87049728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129972150).

87049728 is an abundant number, since it is smaller than the sum of its proper divisors (172894572).

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

87049728 is an equidigital number, since it uses as much as digits as its factorization.

87049728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87049728 is about 9330.0443728848. The cubic root of 87049728 is about 443.1891702793.

The spelling of 87049728 in words is "eighty-seven million, forty-nine thousand, seven hundred twenty-eight".