28696923 has 20 divisors (see below), whose sum is σ = 43056640. Its totient is φ = 19047312.

The previous prime is 28696909. The next prime is 28696949. The reversal of 28696923 is 32969682.

It is not a de Polignac number, because 28696923 - 2¹² = 28692827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28696823) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21798 + ... + 23076.

It is an arithmetic number, because the mean of its divisors is an integer number (2152832).

Almost surely, 2^28696923 is an apocalyptic number.

28696923 is a deficient number, since it is larger than the sum of its proper divisors (14359717).

28696923 is a wasteful number, since it uses less digits than its factorization.

28696923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 1559 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 28696923 is about 5356.9509051325. The cubic root of 28696923 is about 306.1576465659.

The spelling of 28696923 in words is "twenty-eight million, six hundred ninety-six thousand, nine hundred twenty-three".