28208480 has 24 divisors (see below), whose sum is σ = 66642912. Its totient is φ = 11283328.

The previous prime is 28208459. The next prime is 28208489. The reversal of 28208480 is 8480282.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208489) 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 3 ways as a sum of consecutive naturals, for example, 87992 + ... + 88311.

It is an arithmetic number, because the mean of its divisors is an integer number (2776788).

Almost surely, 2^28208480 is an apocalyptic number.

28208480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28208480 is an abundant number, since it is smaller than the sum of its proper divisors (38434432).

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

28208480 is a wasteful number, since it uses less digits than its factorization.

28208480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176318 (or 176310 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 28208480 is about 5311.1655971171. The cubic root of 28208480 is about 304.4106868560.

The spelling of 28208480 in words is "twenty-eight million, two hundred eight thousand, four hundred eighty".