28963897 has 4 divisors (see below), whose sum is σ = 29637520. Its totient is φ = 28290276.

The previous prime is 28963873. The next prime is 28963919. The reversal of 28963897 is 79836982.

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 a de Polignac number, because none of the positive numbers 2^k-28963897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28163897) 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, 336747 + ... + 336832.

It is an arithmetic number, because the mean of its divisors is an integer number (7409380).

Almost surely, 2^28963897 is an apocalyptic number.

It is an amenable number.

28963897 is a deficient number, since it is larger than the sum of its proper divisors (673623).

28963897 is an equidigital number, since it uses as much as digits as its factorization.

28963897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673622.

The product of its digits is 1306368, while the sum is 52.

The square root of 28963897 is about 5381.8116838106. The cubic root of 28963897 is about 307.1041355394.

The spelling of 28963897 in words is "twenty-eight million, nine hundred sixty-three thousand, eight hundred ninety-seven".