28260923 has 4 divisors (see below), whose sum is σ = 29748360. Its totient is φ = 26773488.

The previous prime is 28260901. The next prime is 28260949. The reversal of 28260923 is 32906282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28260923 - 2²⁴ = 11483707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28260923.

It is not an unprimeable number, because it can be changed into a prime (28200923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743690 + ... + 743727.

It is an arithmetic number, because the mean of its divisors is an integer number (7437090).

Almost surely, 2^28260923 is an apocalyptic number.

28260923 is a deficient number, since it is larger than the sum of its proper divisors (1487437).

28260923 is a wasteful number, since it uses less digits than its factorization.

28260923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487436.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28260923 is about 5316.1003564643. The cubic root of 28260923 is about 304.5992155859.

The spelling of 28260923 in words is "twenty-eight million, two hundred sixty thousand, nine hundred twenty-three".