28812723 has 8 divisors (see below), whose sum is σ = 38958336. Its totient is φ = 18937800.

The previous prime is 28812697. The next prime is 28812727. The reversal of 28812723 is 32721882.

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

It is not a de Polignac number, because 28812723 - 2⁵ = 28812691 is a prime.

It is a super-3 number, since 3×28812723³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28812727) 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, 67423 + ... + 67848.

It is an arithmetic number, because the mean of its divisors is an integer number (4869792).

Almost surely, 2^28812723 is an apocalyptic number.

28812723 is a deficient number, since it is larger than the sum of its proper divisors (10145613).

28812723 is a wasteful number, since it uses less digits than its factorization.

28812723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135345.

The product of its digits is 10752, while the sum is 33.

The square root of 28812723 is about 5367.7484106467. The cubic root of 28812723 is about 306.5689040664.

The spelling of 28812723 in words is "twenty-eight million, eight hundred twelve thousand, seven hundred twenty-three".