28777672 has 96 divisors (see below), whose sum is σ = 70479360. Its totient is φ = 10771200.

The previous prime is 28777667. The next prime is 28777691. The reversal of 28777672 is 27677782.

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 23 ways as a sum of consecutive naturals, for example, 209988 + ... + 210124.

It is an arithmetic number, because the mean of its divisors is an integer number (734160).

Almost surely, 2^28777672 is an apocalyptic number.

28777672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28777672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35239680).

28777672 is an abundant number, since it is smaller than the sum of its proper divisors (41701688).

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

28777672 is a wasteful number, since it uses less digits than its factorization.

28777672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 188 counting only the distinct ones).

The product of its digits is 460992, while the sum is 46.

The square root of 28777672 is about 5364.4824540677. The cubic root of 28777672 is about 306.4445387879. Note that the first 3 decimals are identical.

The spelling of 28777672 in words is "twenty-eight million, seven hundred seventy-seven thousand, six hundred seventy-two".