28776066 has 32 divisors (see below), whose sum is σ = 63590400. Its totient is φ = 8608080.

The previous prime is 28776043. The next prime is 28776101. The reversal of 28776066 is 66067782.

It is a Curzon number.

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, 2455 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (1987200).

Almost surely, 2^28776066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28776066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31795200).

28776066 is an abundant number, since it is smaller than the sum of its proper divisors (34814334).

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

28776066 is a wasteful number, since it uses less digits than its factorization.

28776066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 28776066 is about 5364.3327637275. The cubic root of 28776066 is about 306.4388380826.

The spelling of 28776066 in words is "twenty-eight million, seven hundred seventy-six thousand, sixty-six".