28297360 has 160 divisors (see below), whose sum is σ = 84994560. Its totient is φ = 8566272.

The previous prime is 28297349. The next prime is 28297363. The reversal of 28297360 is 6379282.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28297363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1230309 + ... + 1230331.

It is an arithmetic number, because the mean of its divisors is an integer number (531216).

Almost surely, 2^28297360 is an apocalyptic number.

28297360 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 28297360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42497280).

28297360 is an abundant number, since it is smaller than the sum of its proper divisors (56697200).

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

28297360 is a wasteful number, since it uses less digits than its factorization.

28297360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28297360 is about 5319.5262946996. The cubic root of 28297360 is about 304.7300666455.

The spelling of 28297360 in words is "twenty-eight million, two hundred ninety-seven thousand, three hundred sixty".