28425491 has 2 divisors, whose sum is σ = 28425492. Its totient is φ = 28425490.

The previous prime is 28425473. The next prime is 28425503. The reversal of 28425491 is 19452482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28425491 - 2⁶ = 28425427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28425431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212745 + 14212746.

It is an arithmetic number, because the mean of its divisors is an integer number (14212746).

Almost surely, 2^28425491 is an apocalyptic number.

28425491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425491 is an equidigital number, since it uses as much as digits as its factorization.

28425491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 28425491 is about 5331.5561518191. The cubic root of 28425491 is about 305.1893154146.

The spelling of 28425491 in words is "twenty-eight million, four hundred twenty-five thousand, four hundred ninety-one".