28897293 has 8 divisors (see below), whose sum is σ = 38647456. Its totient is φ = 19206000.

The previous prime is 28897291. The next prime is 28897303. The reversal of 28897293 is 39279882.

It is a happy number.

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

It is not a de Polignac number, because 28897293 - 2¹ = 28897291 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897291) 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, 13558 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (4830932).

Almost surely, 2^28897293 is an apocalyptic number.

It is an amenable number.

28897293 is a deficient number, since it is larger than the sum of its proper divisors (9750163).

28897293 is a wasteful number, since it uses less digits than its factorization.

28897293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29435.

The product of its digits is 435456, while the sum is 48.

The square root of 28897293 is about 5375.6202432836. The cubic root of 28897293 is about 306.8685541818.

The spelling of 28897293 in words is "twenty-eight million, eight hundred ninety-seven thousand, two hundred ninety-three".