28796981 has 2 divisors, whose sum is σ = 28796982. Its totient is φ = 28796980.

The previous prime is 28796969. The next prime is 28797011. The reversal of 28796981 is 18969782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28793956 + 3025 = 5366^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 28796981 - 2⁶ = 28796917 is a prime.

It is a super-2 number, since 2×28796981² = 1658532229428722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28796921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14398490 + 14398491.

It is an arithmetic number, because the mean of its divisors is an integer number (14398491).

Almost surely, 2^28796981 is an apocalyptic number.

It is an amenable number.

28796981 is a deficient number, since it is larger than the sum of its proper divisors (1).

28796981 is an equidigital number, since it uses as much as digits as its factorization.

28796981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 28796981 is about 5366.2818599101. The cubic root of 28796981 is about 306.5130619897.

The spelling of 28796981 in words is "twenty-eight million, seven hundred ninety-six thousand, nine hundred eighty-one".