28644361 has 8 divisors (see below), whose sum is σ = 29943360. Its totient is φ = 27349872.

The previous prime is 28644359. The next prime is 28644377. The reversal of 28644361 is 16344682.

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 28644361 - 2¹ = 28644359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28644331) 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, 24946 + ... + 26068.

It is an arithmetic number, because the mean of its divisors is an integer number (3742920).

Almost surely, 2^28644361 is an apocalyptic number.

It is an amenable number.

28644361 is a deficient number, since it is larger than the sum of its proper divisors (1298999).

28644361 is a wasteful number, since it uses less digits than its factorization.

28644361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255.

The product of its digits is 27648, while the sum is 34.

The square root of 28644361 is about 5352.0426941496. The cubic root of 28644361 is about 305.9706103319.

It can be divided in two parts, 2864 and 4361, that added together give a square (7225 = 85²).

The spelling of 28644361 in words is "twenty-eight million, six hundred forty-four thousand, three hundred sixty-one".