28715253 has 8 divisors (see below), whose sum is σ = 43756608. Its totient is φ = 16408704.

The previous prime is 28715233. The next prime is 28715257. The reversal of 28715253 is 35251782.

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

It is not a de Polignac number, because 28715253 - 2¹⁰ = 28714229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28715257) 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, 683676 + ... + 683717.

It is an arithmetic number, because the mean of its divisors is an integer number (5469576).

Almost surely, 2^28715253 is an apocalyptic number.

It is an amenable number.

28715253 is a deficient number, since it is larger than the sum of its proper divisors (15041355).

28715253 is a wasteful number, since it uses less digits than its factorization.

28715253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367403.

The product of its digits is 16800, while the sum is 33.

The square root of 28715253 is about 5358.6614933209. The cubic root of 28715253 is about 306.2228181900. Note that the first 3 decimals are identical.

The spelling of 28715253 in words is "twenty-eight million, seven hundred fifteen thousand, two hundred fifty-three".