28774479 has 8 divisors (see below), whose sum is σ = 39603712. Its totient is φ = 18564120.

The previous prime is 28774469. The next prime is 28774507. The reversal of 28774479 is 97447782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28774479 - 2¹² = 28770383 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 154609 + ... + 154794.

It is an arithmetic number, because the mean of its divisors is an integer number (4950464).

Almost surely, 2^28774479 is an apocalyptic number.

28774479 is a deficient number, since it is larger than the sum of its proper divisors (10829233).

28774479 is a wasteful number, since it uses less digits than its factorization.

28774479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309437.

The product of its digits is 790272, while the sum is 48.

The square root of 28774479 is about 5364.1848402157. The cubic root of 28774479 is about 306.4332046118.

The spelling of 28774479 in words is "twenty-eight million, seven hundred seventy-four thousand, four hundred seventy-nine".