28537739 has 2 divisors, whose sum is σ = 28537740. Its totient is φ = 28537738.

The previous prime is 28537709. The next prime is 28537741. The reversal of 28537739 is 93773582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28537739 - 2²⁴ = 11760523 is a prime.

Together with 28537741, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28537739.

It is not a weakly prime, because it can be changed into another prime (28537709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14268869 + 14268870.

It is an arithmetic number, because the mean of its divisors is an integer number (14268870).

Almost surely, 2^28537739 is an apocalyptic number.

28537739 is a deficient number, since it is larger than the sum of its proper divisors (1).

28537739 is an equidigital number, since it uses as much as digits as its factorization.

28537739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The square root of 28537739 is about 5342.0725378827. The cubic root of 28537739 is about 305.5905034089.

The spelling of 28537739 in words is "twenty-eight million, five hundred thirty-seven thousand, seven hundred thirty-nine".