28777876 has 24 divisors (see below), whose sum is σ = 52746624. Its totient is φ = 13712160.

The previous prime is 28777817. The next prime is 28777877. The reversal of 28777876 is 67877782.

It is a super-2 number, since 2×28777876² = 1656332294142752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38361 + ... + 39103.

It is an arithmetic number, because the mean of its divisors is an integer number (2197776).

Almost surely, 2^28777876 is an apocalyptic number.

It is an amenable number.

28777876 is a deficient number, since it is larger than the sum of its proper divisors (23968748).

28777876 is a wasteful number, since it uses less digits than its factorization.

28777876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1189 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 52.

The square root of 28777876 is about 5364.5014679838. The cubic root of 28777876 is about 306.4452628972.

The spelling of 28777876 in words is "twenty-eight million, seven hundred seventy-seven thousand, eight hundred seventy-six".