28997377 has 2 divisors, whose sum is σ = 28997378. Its totient is φ = 28997376.

The previous prime is 28997347. The next prime is 28997383. The reversal of 28997377 is 77379982.

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., 22667121 + 6330256 = 4761^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 28997377 - 2¹⁵ = 28964609 is a prime.

It is not a weakly prime, because it can be changed into another prime (28997317) 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, 14498688 + 14498689.

It is an arithmetic number, because the mean of its divisors is an integer number (14498689).

Almost surely, 2^28997377 is an apocalyptic number.

It is an amenable number.

28997377 is a deficient number, since it is larger than the sum of its proper divisors (1).

28997377 is an equidigital number, since it uses as much as digits as its factorization.

28997377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 52.

The square root of 28997377 is about 5384.9212621913. The cubic root of 28997377 is about 307.2224194306. Note that the first 3 decimals are identical.

The spelling of 28997377 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred seventy-seven".