28777330 has 32 divisors (see below), whose sum is σ = 53280000. Its totient is φ = 11187072.

The previous prime is 28777327. The next prime is 28777337. The reversal of 28777330 is 3377782.

It is a self number, because there is not a number n which added to its sum of digits gives 28777330.

It is not an unprimeable number, because it can be changed into a prime (28777337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57421 + ... + 57919.

It is an arithmetic number, because the mean of its divisors is an integer number (1665000).

Almost surely, 2^28777330 is an apocalyptic number.

28777330 is a deficient number, since it is larger than the sum of its proper divisors (24502670).

28777330 is a wasteful number, since it uses less digits than its factorization.

28777330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 28777330 is about 5364.4505776454. The cubic root of 28777330 is about 306.4433248323.

The spelling of 28777330 in words is "twenty-eight million, seven hundred seventy-seven thousand, three hundred thirty".