28900293 has 8 divisors (see below), whose sum is σ = 39575328. Its totient is φ = 18746064.

The previous prime is 28900271. The next prime is 28900301. The reversal of 28900293 is 39200982.

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

It is not a de Polignac number, because 28900293 - 2²¹ = 26803141 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900393) 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, 130071 + ... + 130292.

It is an arithmetic number, because the mean of its divisors is an integer number (4946916).

Almost surely, 2^28900293 is an apocalyptic number.

It is an amenable number.

28900293 is a deficient number, since it is larger than the sum of its proper divisors (10675035).

28900293 is a wasteful number, since it uses less digits than its factorization.

28900293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260403.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 28900293 is about 5375.8992736100. The cubic root of 28900293 is about 306.8791730981.

The spelling of 28900293 in words is "twenty-eight million, nine hundred thousand, two hundred ninety-three".