28777848 has 64 divisors (see below), whose sum is σ = 79816320. Its totient is φ = 8572800.

The previous prime is 28777817. The next prime is 28777877. The reversal of 28777848 is 84877782.

It is a super-2 number, since 2×28777848² = 1656329071022208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28777848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15211 + ... + 16997.

It is an arithmetic number, because the mean of its divisors is an integer number (1247130).

Almost surely, 2^28777848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28777848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39908160).

28777848 is an abundant number, since it is smaller than the sum of its proper divisors (51038472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28777848 is a wasteful number, since it uses less digits than its factorization.

28777848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1864 counting only the distinct ones).

The product of its digits is 1404928, while the sum is 51.

The square root of 28777848 is about 5364.4988582346. The cubic root of 28777848 is about 306.4451635098.

The spelling of 28777848 in words is "twenty-eight million, seven hundred seventy-seven thousand, eight hundred forty-eight".