28777896 has 96 divisors (see below), whose sum is σ = 93024000. Its totient is φ = 8219232.

The previous prime is 28777877. The next prime is 28777901. The reversal of 28777896 is 69877782.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9225 + ... + 11943.

It is an arithmetic number, because the mean of its divisors is an integer number (969000).

Almost surely, 2^28777896 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 28777896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46512000).

28777896 is an abundant number, since it is smaller than the sum of its proper divisors (64246104).

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

28777896 is a wasteful number, since it uses less digits than its factorization.

28777896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748 (or 2731 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 28777896 is about 5364.5033320896. The cubic root of 28777896 is about 306.4453338881.

It can be divided in two parts, 28 and 777896, that added together give a square (777924 = 882²).

The spelling of 28777896 in words is "twenty-eight million, seven hundred seventy-seven thousand, eight hundred ninety-six".