28312480 has 96 divisors (see below), whose sum is σ = 80994816. Its totient is φ = 9129984.

The previous prime is 28312477. The next prime is 28312499. The reversal of 28312480 is 8421382.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18297 + ... + 19783.

It is an arithmetic number, because the mean of its divisors is an integer number (843696).

Almost surely, 2^28312480 is an apocalyptic number.

28312480 is a gapful number since it is divisible by the number (20) 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 28312480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40497408).

28312480 is an abundant number, since it is smaller than the sum of its proper divisors (52682336).

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

28312480 is a wasteful number, since it uses less digits than its factorization.

28312480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28312480 is about 5320.9472840839. The cubic root of 28312480 is about 304.7843319929.

The spelling of 28312480 in words is "twenty-eight million, three hundred twelve thousand, four hundred eighty".