28848621 has 4 divisors (see below), whose sum is σ = 38464832. Its totient is φ = 19232412.

The previous prime is 28848607. The next prime is 28848661. The reversal of 28848621 is 12684882.

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 not a de Polignac number, because 28848621 - 2⁶ = 28848557 is a prime.

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 28848621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28848661) 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, 4808101 + ... + 4808106.

It is an arithmetic number, because the mean of its divisors is an integer number (9616208).

Almost surely, 2^28848621 is an apocalyptic number.

It is an amenable number.

28848621 is a deficient number, since it is larger than the sum of its proper divisors (9616211).

28848621 is an equidigital number, since it uses as much as digits as its factorization.

28848621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9616210.

The product of its digits is 49152, while the sum is 39.

The square root of 28848621 is about 5371.0912299085. The cubic root of 28848621 is about 306.6961701031.

The spelling of 28848621 in words is "twenty-eight million, eight hundred forty-eight thousand, six hundred twenty-one".