28813380 has 48 divisors (see below), whose sum is σ = 82864320. Its totient is φ = 7475328.

The previous prime is 28813361. The next prime is 28813391. The reversal of 28813380 is 8331882.

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, 4270 + ... + 8709.

It is an arithmetic number, because the mean of its divisors is an integer number (1726340).

Almost surely, 2^28813380 is an apocalyptic number.

28813380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28813380 is an abundant number, since it is smaller than the sum of its proper divisors (54050940).

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

28813380 is a wasteful number, since it uses less digits than its factorization.

28813380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13028 (or 13026 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28813380 is about 5367.8096091423. The cubic root of 28813380 is about 306.5712342203.

The spelling of 28813380 in words is "twenty-eight million, eight hundred thirteen thousand, three hundred eighty".