28343537 has 2 divisors, whose sum is σ = 28343538. Its totient is φ = 28343536.

The previous prime is 28343507. The next prime is 28343543. The reversal of 28343537 is 73534382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 8904256 = 4409^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 28343537 - 2¹⁶ = 28278001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28343497 and 28343506.

It is not a weakly prime, because it can be changed into another prime (28343507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14171768 + 14171769.

It is an arithmetic number, because the mean of its divisors is an integer number (14171769).

Almost surely, 2^28343537 is an apocalyptic number.

It is an amenable number.

28343537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28343537 is an equidigital number, since it uses as much as digits as its factorization.

28343537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 28343537 is about 5323.8648555349. The cubic root of 28343537 is about 304.8957343147.

The spelling of 28343537 in words is "twenty-eight million, three hundred forty-three thousand, five hundred thirty-seven".