28906253 has 8 divisors (see below), whose sum is σ = 29937816. Its totient is φ = 27892800.

The previous prime is 28906249. The next prime is 28906259. The reversal of 28906253 is 35260982.

It can be written as a sum of positive squares in 4 ways, for example, as 2301289 + 26604964 = 1517^2 + 5158^2 .

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 28906253 - 2² = 28906249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28906259) 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, 1238 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (3742227).

Almost surely, 2^28906253 is an apocalyptic number.

It is an amenable number.

28906253 is a deficient number, since it is larger than the sum of its proper divisors (1031563).

28906253 is an equidigital number, since it uses as much as digits as its factorization.

28906253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9055.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 28906253 is about 5376.4535708960. The cubic root of 28906253 is about 306.9002671651.

The spelling of 28906253 in words is "twenty-eight million, nine hundred six thousand, two hundred fifty-three".