28213259 has 8 divisors (see below), whose sum is σ = 29588160. Its totient is φ = 26865216.

The previous prime is 28213253. The next prime is 28213261. The reversal of 28213259 is 95231282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28213259 - 2¹⁶ = 28147723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28213253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4547 + ... + 8780.

It is an arithmetic number, because the mean of its divisors is an integer number (3698520).

Almost surely, 2^28213259 is an apocalyptic number.

28213259 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28213259 is a deficient number, since it is larger than the sum of its proper divisors (1374901).

28213259 is a wasteful number, since it uses less digits than its factorization.

28213259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13429.

The product of its digits is 8640, while the sum is 32.

The square root of 28213259 is about 5311.6154793057. The cubic root of 28213259 is about 304.4278766812.

The spelling of 28213259 in words is "twenty-eight million, two hundred thirteen thousand, two hundred fifty-nine".