28894723 has 8 divisors (see below), whose sum is σ = 33946416. Its totient is φ = 24247200.

The previous prime is 28894721. The next prime is 28894729. The reversal of 28894723 is 32749882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28894723 - 2¹ = 28894721 is a prime.

It is a super-3 number, since 3×28894723³ (a number of 23 digits) contains 333 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 28894723.

It is not an unprimeable number, because it can be changed into a prime (28894721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100888 + ... + 101173.

It is an arithmetic number, because the mean of its divisors is an integer number (4243302).

Almost surely, 2^28894723 is an apocalyptic number.

28894723 is a deficient number, since it is larger than the sum of its proper divisors (5051693).

28894723 is a wasteful number, since it uses less digits than its factorization.

28894723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202085.

The product of its digits is 193536, while the sum is 43.

The square root of 28894723 is about 5375.3811957851. The cubic root of 28894723 is about 306.8594567256.

The spelling of 28894723 in words is "twenty-eight million, eight hundred ninety-four thousand, seven hundred twenty-three".