28748253 has 8 divisors (see below), whose sum is σ = 39567616. Its totient is φ = 18547200.

The previous prime is 28748249. The next prime is 28748261. The reversal of 28748253 is 35284782.

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

It is not a de Polignac number, because 28748253 - 2² = 28748249 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 (28748243) 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, 154468 + ... + 154653.

It is an arithmetic number, because the mean of its divisors is an integer number (4945952).

Almost surely, 2^28748253 is an apocalyptic number.

It is an amenable number.

28748253 is a deficient number, since it is larger than the sum of its proper divisors (10819363).

28748253 is a wasteful number, since it uses less digits than its factorization.

28748253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309155.

The product of its digits is 107520, while the sum is 39.

The square root of 28748253 is about 5361.7397363169. The cubic root of 28748253 is about 306.3400785696.

The spelling of 28748253 in words is "twenty-eight million, seven hundred forty-eight thousand, two hundred fifty-three".