28914923 has 4 divisors (see below), whose sum is σ = 28932120. Its totient is φ = 28897728.

The previous prime is 28914901. The next prime is 28914929. The reversal of 28914923 is 32941982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32941982 = 2 ⋅16470991.

It is a cyclic number.

It is not a de Polignac number, because 28914923 - 2⁶ = 28914859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28914929) 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, 5765 + ... + 9542.

It is an arithmetic number, because the mean of its divisors is an integer number (7233030).

Almost surely, 2^28914923 is an apocalyptic number.

28914923 is a deficient number, since it is larger than the sum of its proper divisors (17197).

28914923 is a wasteful number, since it uses less digits than its factorization.

28914923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17196.

The product of its digits is 31104, while the sum is 38.

The square root of 28914923 is about 5377.2598040266. The cubic root of 28914923 is about 306.9309474858.

The spelling of 28914923 in words is "twenty-eight million, nine hundred fourteen thousand, nine hundred twenty-three".