28201230 has 64 divisors (see below), whose sum is σ = 75816000. Its totient is φ = 7459200.

The previous prime is 28201223. The next prime is 28201231. The reversal of 28201230 is 3210282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28201231) 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, 39880 + ... + 40580.

It is an arithmetic number, because the mean of its divisors is an integer number (1184625).

Almost surely, 2^28201230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28201230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37908000).

28201230 is an abundant number, since it is smaller than the sum of its proper divisors (47614770).

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

28201230 is a wasteful number, since it uses less digits than its factorization.

28201230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28201230 is about 5310.4830288779. The cubic root of 28201230 is about 304.3846052594.

The spelling of 28201230 in words is "twenty-eight million, two hundred one thousand, two hundred thirty".