28944617 has 4 divisors (see below), whose sum is σ = 31171140. Its totient is φ = 26718096.

The previous prime is 28944589. The next prime is 28944631. The reversal of 28944617 is 71644982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71644982 = 2 ⋅35822491.

It can be written as a sum of positive squares in 2 ways, for example, as 16192576 + 12752041 = 4024^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 28944617 - 2⁸ = 28944361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28944637) 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, 1113242 + ... + 1113267.

It is an arithmetic number, because the mean of its divisors is an integer number (7792785).

Almost surely, 2^28944617 is an apocalyptic number.

It is an amenable number.

28944617 is a deficient number, since it is larger than the sum of its proper divisors (2226523).

28944617 is a wasteful number, since it uses less digits than its factorization.

28944617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226522.

The product of its digits is 96768, while the sum is 41.

The square root of 28944617 is about 5380.0201672484. The cubic root of 28944617 is about 307.0359784817.

The spelling of 28944617 in words is "twenty-eight million, nine hundred forty-four thousand, six hundred seventeen".