28487304 has 24 divisors (see below), whose sum is σ = 77153310. Its totient is φ = 9495744.

The previous prime is 28487297. The next prime is 28487351. The reversal of 28487304 is 40378482.

It can be written as a sum of positive squares in only one way, i.e., 14424804 + 14062500 = 3798^2 + 3750^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197757 + ... + 197900.

Almost surely, 2^28487304 is an apocalyptic number.

28487304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28487304 is an abundant number, since it is smaller than the sum of its proper divisors (48666006).

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

28487304 is a wasteful number, since it uses less digits than its factorization.

28487304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395669 (or 395662 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28487304 is about 5337.3499042128. The cubic root of 28487304 is about 305.4103729801.

The spelling of 28487304 in words is "twenty-eight million, four hundred eighty-seven thousand, three hundred four".