28774461 has 4 divisors (see below), whose sum is σ = 38365952. Its totient is φ = 19182972.

The previous prime is 28774457. The next prime is 28774469. The reversal of 28774461 is 16447782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28774461 - 2² = 28774457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28774469) 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, 4795741 + ... + 4795746.

It is an arithmetic number, because the mean of its divisors is an integer number (9591488).

Almost surely, 2^28774461 is an apocalyptic number.

It is an amenable number.

28774461 is a deficient number, since it is larger than the sum of its proper divisors (9591491).

28774461 is an equidigital number, since it uses as much as digits as its factorization.

28774461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9591490.

The product of its digits is 75264, while the sum is 39.

The square root of 28774461 is about 5364.1831624209. The cubic root of 28774461 is about 306.4331407149.

The spelling of 28774461 in words is "twenty-eight million, seven hundred seventy-four thousand, four hundred sixty-one".