28613491 has 2 divisors, whose sum is σ = 28613492. Its totient is φ = 28613490.

The previous prime is 28613483. The next prime is 28613537. The reversal of 28613491 is 19431682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28613491 - 2³ = 28613483 is a prime.

It is not a weakly prime, because it can be changed into another prime (28613441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14306745 + 14306746.

It is an arithmetic number, because the mean of its divisors is an integer number (14306746).

Almost surely, 2^28613491 is an apocalyptic number.

28613491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28613491 is an equidigital number, since it uses as much as digits as its factorization.

28613491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 28613491 is about 5349.1579711203. The cubic root of 28613491 is about 305.8606560801.

It can be divided in two parts, 286134 and 91, that added together give a square (286225 = 535²).

The spelling of 28613491 in words is "twenty-eight million, six hundred thirteen thousand, four hundred ninety-one".