28388741 has 2 divisors, whose sum is σ = 28388742. Its totient is φ = 28388740.

The previous prime is 28388713. The next prime is 28388791. The reversal of 28388741 is 14788382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22287841 + 6100900 = 4721^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 28388741 - 2¹⁸ = 28126597 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 (28388791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14194370 + 14194371.

It is an arithmetic number, because the mean of its divisors is an integer number (14194371).

Almost surely, 2^28388741 is an apocalyptic number.

It is an amenable number.

28388741 is a deficient number, since it is larger than the sum of its proper divisors (1).

28388741 is an equidigital number, since it uses as much as digits as its factorization.

28388741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 41.

The square root of 28388741 is about 5328.1085762210. The cubic root of 28388741 is about 305.0577369868.

The spelling of 28388741 in words is "twenty-eight million, three hundred eighty-eight thousand, seven hundred forty-one".