28337261 has 2 divisors, whose sum is σ = 28337262. Its totient is φ = 28337260.

The previous prime is 28337207. The next prime is 28337291. The reversal of 28337261 is 16273382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19307236 + 9030025 = 4394^2 + 3005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28337261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28337291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14168630 + 14168631.

It is an arithmetic number, because the mean of its divisors is an integer number (14168631).

Almost surely, 2^28337261 is an apocalyptic number.

It is an amenable number.

28337261 is a deficient number, since it is larger than the sum of its proper divisors (1).

28337261 is an equidigital number, since it uses as much as digits as its factorization.

28337261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 28337261 is about 5323.2754014798. The cubic root of 28337261 is about 304.8732286916.

The spelling of 28337261 in words is "twenty-eight million, three hundred thirty-seven thousand, two hundred sixty-one".