28694723 has 4 divisors (see below), whose sum is σ = 28714248. Its totient is φ = 28675200.

The previous prime is 28694719. The next prime is 28694737. The reversal of 28694723 is 32749682.

It is a happy number.

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 28694723 - 2² = 28694719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28694923) 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, 7361 + ... + 10562.

It is an arithmetic number, because the mean of its divisors is an integer number (7178562).

Almost surely, 2^28694723 is an apocalyptic number.

28694723 is a deficient number, since it is larger than the sum of its proper divisors (19525).

28694723 is a wasteful number, since it uses less digits than its factorization.

28694723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19524.

The product of its digits is 145152, while the sum is 41.

The square root of 28694723 is about 5356.7455605059. The cubic root of 28694723 is about 306.1498226837.

The spelling of 28694723 in words is "twenty-eight million, six hundred ninety-four thousand, seven hundred twenty-three".