28908480 has 56 divisors (see below), whose sum is σ = 91787472. Its totient is φ = 7708672.

The previous prime is 28908469. The next prime is 28908487. The reversal of 28908480 is 8480982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28908487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14097 + ... + 16016.

It is an arithmetic number, because the mean of its divisors is an integer number (1639062).

Almost surely, 2^28908480 is an apocalyptic number.

28908480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28908480 is an abundant number, since it is smaller than the sum of its proper divisors (62878992).

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

28908480 is a wasteful number, since it uses less digits than its factorization.

28908480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30133 (or 30123 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 28908480 is about 5376.6606736896. The cubic root of 28908480 is about 306.9081483820.

The spelling of 28908480 in words is "twenty-eight million, nine hundred eight thousand, four hundred eighty".