28840230 has 48 divisors (see below), whose sum is σ = 77410944. Its totient is φ = 7441920.

The previous prime is 28840193. The next prime is 28840241. The reversal of 28840230 is 3204882.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28840194 and 28840203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2379 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (1612728).

Almost surely, 2^28840230 is an apocalyptic number.

28840230 is an abundant number, since it is smaller than the sum of its proper divisors (48570714).

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

28840230 is a wasteful number, since it uses less digits than its factorization.

28840230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381 (or 10378 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28840230 is about 5370.3100469154. The cubic root of 28840230 is about 306.6664316843. Note that the first 3 decimals are identical.

The spelling of 28840230 in words is "twenty-eight million, eight hundred forty thousand, two hundred thirty".