28770306 has 8 divisors (see below), whose sum is σ = 57540624. Its totient is φ = 9590100.

The previous prime is 28770293. The next prime is 28770323. The reversal of 28770306 is 60307782.

It is a sphenic number, since it is the product of 3 distinct primes.

28770306 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397520 + ... + 2397531.

It is an arithmetic number, because the mean of its divisors is an integer number (7192578).

Almost surely, 2^28770306 is an apocalyptic number.

28770306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28770306 is a wasteful number, since it uses less digits than its factorization.

28770306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795056.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 28770306 is about 5363.7958574129. The cubic root of 28770306 is about 306.4183904706.

The spelling of 28770306 in words is "twenty-eight million, seven hundred seventy thousand, three hundred six".