87020304 has 160 divisors (see below), whose sum is σ = 277601280. Its totient is φ = 22934016.

The previous prime is 87020303. The next prime is 87020309. The reversal of 87020304 is 40302078.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (87020303) 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 31 ways as a sum of consecutive naturals, for example, 274354 + ... + 274670.

It is an arithmetic number, because the mean of its divisors is an integer number (1735008).

Almost surely, 2^87020304 is an apocalyptic number.

87020304 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87020304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138800640).

87020304 is an abundant number, since it is smaller than the sum of its proper divisors (190580976).

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

87020304 is a wasteful number, since it uses less digits than its factorization.

87020304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 87020304 is about 9328.4673982386. The cubic root of 87020304 is about 443.1392299827.

The spelling of 87020304 in words is "eighty-seven million, twenty thousand, three hundred four".