28282730 has 32 divisors (see below), whose sum is σ = 61606656. Its totient is φ = 9126144.

The previous prime is 28282693. The next prime is 28282739. The reversal of 28282730 is 3728282.

It is not an unprimeable number, because it can be changed into a prime (28282739) 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, 10694 + ... + 13073.

It is an arithmetic number, because the mean of its divisors is an integer number (1925208).

Almost surely, 2^28282730 is an apocalyptic number.

28282730 is an abundant number, since it is smaller than the sum of its proper divisors (33323926).

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

28282730 is a wasteful number, since it uses less digits than its factorization.

28282730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23798.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28282730 is about 5318.1509944717. The cubic root of 28282730 is about 304.6775414935.

The spelling of 28282730 in words is "twenty-eight million, two hundred eighty-two thousand, seven hundred thirty".