28798331 has 2 divisors, whose sum is σ = 28798332. Its totient is φ = 28798330.

The previous prime is 28798327. The next prime is 28798339. The reversal of 28798331 is 13389782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28798331 - 2² = 28798327 is a prime.

It is a super-2 number, since 2×28798331² = 1658687736771122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28798339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399165 + 14399166.

It is an arithmetic number, because the mean of its divisors is an integer number (14399166).

Almost surely, 2^28798331 is an apocalyptic number.

28798331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28798331 is an equidigital number, since it uses as much as digits as its factorization.

28798331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 28798331 is about 5366.4076438526. The cubic root of 28798331 is about 306.5178516836.

The spelling of 28798331 in words is "twenty-eight million, seven hundred ninety-eight thousand, three hundred thirty-one".