28779312 has 40 divisors (see below), whose sum is σ = 75573040. Its totient is φ = 9434880.

The previous prime is 28779299. The next prime is 28779313. The reversal of 28779312 is 21397782.

It is not an unprimeable number, because it can be changed into a prime (28779313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 7842.

It is an arithmetic number, because the mean of its divisors is an integer number (1889326).

Almost surely, 2^28779312 is an apocalyptic number.

It is an amenable number.

28779312 is an abundant number, since it is smaller than the sum of its proper divisors (46793728).

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

28779312 is a wasteful number, since it uses less digits than its factorization.

28779312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9901 (or 9895 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 28779312 is about 5364.6353091333. The cubic root of 28779312 is about 306.4503599618.

The spelling of 28779312 in words is "twenty-eight million, seven hundred seventy-nine thousand, three hundred twelve".