28735776 has 96 divisors (see below), whose sum is σ = 85075200. Its totient is φ = 9434880.

The previous prime is 28735757. The next prime is 28735783. The reversal of 28735776 is 67753782.

28735776 is a `hidden beast` number, since 2 + 8 + 73 + 577 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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, 68046 + ... + 68466.

It is an arithmetic number, because the mean of its divisors is an integer number (886200).

Almost surely, 2^28735776 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 28735776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42537600).

28735776 is an abundant number, since it is smaller than the sum of its proper divisors (56339424).

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

28735776 is a wasteful number, since it uses less digits than its factorization.

28735776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 505 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 28735776 is about 5360.5760884442. The cubic root of 28735776 is about 306.2957540414.

It can be divided in two parts, 2873 and 5776, that added together give a square (8649 = 93²).

The spelling of 28735776 in words is "twenty-eight million, seven hundred thirty-five thousand, seven hundred seventy-six".