28476391 has 2 divisors, whose sum is σ = 28476392. Its totient is φ = 28476390.

The previous prime is 28476389. The next prime is 28476397. The reversal of 28476391 is 19367482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28476391 - 2¹ = 28476389 is a prime.

Together with 28476389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28476397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14238195 + 14238196.

It is an arithmetic number, because the mean of its divisors is an integer number (14238196).

Almost surely, 2^28476391 is an apocalyptic number.

28476391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28476391 is an equidigital number, since it uses as much as digits as its factorization.

28476391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 28476391 is about 5336.3274824546. The cubic root of 28476391 is about 305.3713688318.

The spelling of 28476391 in words is "twenty-eight million, four hundred seventy-six thousand, three hundred ninety-one".