28777479 has 8 divisors (see below), whose sum is σ = 38742912. Its totient is φ = 18998520.

The previous prime is 28777459. The next prime is 28777499. The reversal of 28777479 is 97477782.

It is an interprime number because it is at equal distance from previous prime (28777459) and next prime (28777499).

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

It is not a de Polignac number, because 28777479 - 2⁹ = 28776967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777459) 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, 46257 + ... + 46874.

It is an arithmetic number, because the mean of its divisors is an integer number (4842864).

Almost surely, 2^28777479 is an apocalyptic number.

28777479 is a deficient number, since it is larger than the sum of its proper divisors (9965433).

28777479 is a wasteful number, since it uses less digits than its factorization.

28777479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93237.

The product of its digits is 1382976, while the sum is 51.

The square root of 28777479 is about 5364.4644653497. The cubic root of 28777479 is about 306.4438537206.

The spelling of 28777479 in words is "twenty-eight million, seven hundred seventy-seven thousand, four hundred seventy-nine".