28104437 has 2 divisors, whose sum is σ = 28104438. Its totient is φ = 28104436.

The previous prime is 28104389. The next prime is 28104463. The reversal of 28104437 is 73440182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27102436 + 1002001 = 5206^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 28104437 - 2¹⁸ = 27842293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28104337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14052218 + 14052219.

It is an arithmetic number, because the mean of its divisors is an integer number (14052219).

Almost surely, 2^28104437 is an apocalyptic number.

It is an amenable number.

28104437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28104437 is an equidigital number, since it uses as much as digits as its factorization.

28104437 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 29.

The square root of 28104437 is about 5301.3618061777. The cubic root of 28104437 is about 304.0359671491.

The spelling of 28104437 in words is "twenty-eight million, one hundred four thousand, four hundred thirty-seven".