28774459 has 4 divisors (see below), whose sum is σ = 32885104. Its totient is φ = 24663816.

The previous prime is 28774457. The next prime is 28774469. The reversal of 28774459 is 95447782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95447782 = 2 ⋅47723891.

It is a cyclic number.

It is not a de Polignac number, because 28774459 - 2¹ = 28774457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28774451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055312 + ... + 2055325.

It is an arithmetic number, because the mean of its divisors is an integer number (8221276).

Almost surely, 2^28774459 is an apocalyptic number.

28774459 is a deficient number, since it is larger than the sum of its proper divisors (4110645).

28774459 is an equidigital number, since it uses as much as digits as its factorization.

28774459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110644.

The product of its digits is 564480, while the sum is 46.

The square root of 28774459 is about 5364.1829759992. The cubic root of 28774459 is about 306.4331336153.

The spelling of 28774459 in words is "twenty-eight million, seven hundred seventy-four thousand, four hundred fifty-nine".