28911037 has 2 divisors, whose sum is σ = 28911038. Its totient is φ = 28911036.

The previous prime is 28911031. The next prime is 28911041. The reversal of 28911037 is 73011982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19307236 + 9603801 = 4394^2 + 3099^2 .

It is a cyclic number.

It is not a de Polignac number, because 28911037 - 2⁷ = 28910909 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 (28911031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14455518 + 14455519.

It is an arithmetic number, because the mean of its divisors is an integer number (14455519).

Almost surely, 2^28911037 is an apocalyptic number.

It is an amenable number.

28911037 is a deficient number, since it is larger than the sum of its proper divisors (1).

28911037 is an equidigital number, since it uses as much as digits as its factorization.

28911037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 28911037 is about 5376.8984554295. The cubic root of 28911037 is about 306.9171969495.

The spelling of 28911037 in words is "twenty-eight million, nine hundred eleven thousand, thirty-seven".