28768230 has 64 divisors (see below), whose sum is σ = 78382080. Its totient is φ = 7504992.

The previous prime is 28768213. The next prime is 28768249. The reversal of 28768230 is 3286782.

It is a happy number.

It is a super-2 number, since 2×28768230² = 1655222114665800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11557 + ... + 13823.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^28768230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28768230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39191040).

28768230 is an abundant number, since it is smaller than the sum of its proper divisors (49613850).

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

28768230 is a wasteful number, since it uses less digits than its factorization.

28768230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28768230 is about 5363.6023342526. The cubic root of 28768230 is about 306.4110201414.

The spelling of 28768230 in words is "twenty-eight million, seven hundred sixty-eight thousand, two hundred thirty".