28777100 has 36 divisors (see below), whose sum is σ = 68125848. Its totient is φ = 10464000.

The previous prime is 28777097. The next prime is 28777129. The reversal of 28777100 is 177782.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11981 + ... + 14180.

Almost surely, 2^28777100 is an apocalyptic number.

28777100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28777100 is an abundant number, since it is smaller than the sum of its proper divisors (39348748).

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

28777100 is a wasteful number, since it uses less digits than its factorization.

28777100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26186 (or 26179 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 28777100 is about 5364.4291401789. The cubic root of 28777100 is about 306.4425084240.

The spelling of 28777100 in words is "twenty-eight million, seven hundred seventy-seven thousand, one hundred".