28034491 has 2 divisors, whose sum is σ = 28034492. Its totient is φ = 28034490.

The previous prime is 28034483. The next prime is 28034497. The reversal of 28034491 is 19443082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28034491 - 2³ = 28034483 is a prime.

It is not a weakly prime, because it can be changed into another prime (28034497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14017245 + 14017246.

It is an arithmetic number, because the mean of its divisors is an integer number (14017246).

Almost surely, 2^28034491 is an apocalyptic number.

28034491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28034491 is an equidigital number, since it uses as much as digits as its factorization.

28034491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28034491 is about 5294.7607122513. The cubic root of 28034491 is about 303.7835305384.

The spelling of 28034491 in words is "twenty-eight million, thirty-four thousand, four hundred ninety-one".