28930523 has 4 divisors (see below), whose sum is σ = 28989000. Its totient is φ = 28872048.

The previous prime is 28930501. The next prime is 28930567. The reversal of 28930523 is 32503982.

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 28930523 - 2¹⁰ = 28929499 is a prime.

It is a super-2 number, since 2×28930523² = 1673950322107058, which contains 22 as substring.

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 28930523.

It is not an unprimeable number, because it can be changed into a prime (28930123) 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, 28490 + ... + 29487.

It is an arithmetic number, because the mean of its divisors is an integer number (7247250).

Almost surely, 2^28930523 is an apocalyptic number.

28930523 is a deficient number, since it is larger than the sum of its proper divisors (58477).

28930523 is an equidigital number, since it uses as much as digits as its factorization.

28930523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58476.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28930523 is about 5378.7101613677. The cubic root of 28930523 is about 306.9861353895.

The spelling of 28930523 in words is "twenty-eight million, nine hundred thirty thousand, five hundred twenty-three".