28213260 has 48 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 7499200.

The previous prime is 28213253. The next prime is 28213261. The reversal of 28213260 is 6231282.

It is a self number, because there is not a number n which added to its sum of digits gives 28213260.

It is not an unprimeable number, because it can be changed into a prime (28213261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25315 + ... + 26405.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^28213260 is an apocalyptic number.

28213260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28213260 is an abundant number, since it is smaller than the sum of its proper divisors (51039732).

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

28213260 is a wasteful number, since it uses less digits than its factorization.

28213260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534 (or 1532 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28213260 is about 5311.6155734390. The cubic root of 28213260 is about 304.4278802780.

The spelling of 28213260 in words is "twenty-eight million, two hundred thirteen thousand, two hundred sixty".