28238701 has 2 divisors, whose sum is σ = 28238702. Its totient is φ = 28238700.

The previous prime is 28238671. The next prime is 28238719. The reversal of 28238701 is 10783282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 5294601 = 4790^2 + 2301^2 .

It is a cyclic number.

It is not a de Polignac number, because 28238701 - 2¹⁹ = 27714413 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 (28238741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14119350 + 14119351.

It is an arithmetic number, because the mean of its divisors is an integer number (14119351).

Almost surely, 2^28238701 is an apocalyptic number.

It is an amenable number.

28238701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28238701 is an equidigital number, since it uses as much as digits as its factorization.

28238701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28238701 is about 5314.0098795542. The cubic root of 28238701 is about 304.5193576293.

It can be divided in two parts, 282 and 38701, that added together give a palindrome (38983).

The spelling of 28238701 in words is "twenty-eight million, two hundred thirty-eight thousand, seven hundred one".