28623849 has 4 divisors (see below), whose sum is σ = 38165136. Its totient is φ = 19082564.

The previous prime is 28623839. The next prime is 28623851. The reversal of 28623849 is 94832682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28623849 - 2⁸ = 28623593 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28623849.

It is not an unprimeable number, because it can be changed into a prime (28623809) 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, 4770639 + ... + 4770644.

It is an arithmetic number, because the mean of its divisors is an integer number (9541284).

Almost surely, 2^28623849 is an apocalyptic number.

It is an amenable number.

28623849 is a deficient number, since it is larger than the sum of its proper divisors (9541287).

28623849 is an equidigital number, since it uses as much as digits as its factorization.

28623849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9541286.

The product of its digits is 165888, while the sum is 42.

The square root of 28623849 is about 5350.1260732809. The cubic root of 28623849 is about 305.8975585151.

The spelling of 28623849 in words is "twenty-eight million, six hundred twenty-three thousand, eight hundred forty-nine".