28973837 has 2 divisors, whose sum is σ = 28973838. Its totient is φ = 28973836.

The previous prime is 28973771. The next prime is 28973843. The reversal of 28973837 is 73837982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15570916 + 13402921 = 3946^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 28973837 - 2¹² = 28969741 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28973791 and 28973800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28979837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486918 + 14486919.

It is an arithmetic number, because the mean of its divisors is an integer number (14486919).

Almost surely, 2^28973837 is an apocalyptic number.

It is an amenable number.

28973837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28973837 is an equidigital number, since it uses as much as digits as its factorization.

28973837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 28973837 is about 5382.7350854375. The cubic root of 28973837 is about 307.1392627873.

The spelling of 28973837 in words is "twenty-eight million, nine hundred seventy-three thousand, eight hundred thirty-seven".