28617949 has 4 divisors (see below), whose sum is σ = 28668640. Its totient is φ = 28567260.

The previous prime is 28617947. The next prime is 28617961. The reversal of 28617949 is 94971682.

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 28617949 - 2¹ = 28617947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28617899 and 28617908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28617947) 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, 24489 + ... + 25630.

It is an arithmetic number, because the mean of its divisors is an integer number (7167160).

Almost surely, 2^28617949 is an apocalyptic number.

It is an amenable number.

28617949 is a deficient number, since it is larger than the sum of its proper divisors (50691).

28617949 is an equidigital number, since it uses as much as digits as its factorization.

28617949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50690.

The product of its digits is 217728, while the sum is 46.

The square root of 28617949 is about 5349.5746559890. The cubic root of 28617949 is about 305.8765396831.

The spelling of 28617949 in words is "twenty-eight million, six hundred seventeen thousand, nine hundred forty-nine".