28477291 has 2 divisors, whose sum is σ = 28477292. Its totient is φ = 28477290.

The previous prime is 28477279. The next prime is 28477297. The reversal of 28477291 is 19277482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28477291 - 2⁵ = 28477259 is a prime.

It is a super-2 number, since 2×28477291² = 1621912205397362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28477297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14238645 + 14238646.

It is an arithmetic number, because the mean of its divisors is an integer number (14238646).

Almost surely, 2^28477291 is an apocalyptic number.

28477291 is a deficient number, since it is larger than the sum of its proper divisors (1).

28477291 is an equidigital number, since it uses as much as digits as its factorization.

28477291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 28477291 is about 5336.4118094465. The cubic root of 28477291 is about 305.3745858984.

The spelling of 28477291 in words is "twenty-eight million, four hundred seventy-seven thousand, two hundred ninety-one".