28488637 has 2 divisors, whose sum is σ = 28488638. Its totient is φ = 28488636.

The previous prime is 28488611. The next prime is 28488653. The reversal of 28488637 is 73688482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16475481 + 12013156 = 4059^2 + 3466^2 .

It is a cyclic number.

It is not a de Polignac number, because 28488637 - 2¹¹ = 28486589 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 (28488137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14244318 + 14244319.

It is an arithmetic number, because the mean of its divisors is an integer number (14244319).

Almost surely, 2^28488637 is an apocalyptic number.

It is an amenable number.

28488637 is a deficient number, since it is larger than the sum of its proper divisors (1).

28488637 is an equidigital number, since it uses as much as digits as its factorization.

28488637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 46.

The square root of 28488637 is about 5337.4747774580. The cubic root of 28488637 is about 305.4151365720.

The spelling of 28488637 in words is "twenty-eight million, four hundred eighty-eight thousand, six hundred thirty-seven".