28474930 has 48 divisors (see below), whose sum is σ = 57139992. Its totient is φ = 10208000.

The previous prime is 28474921. The next prime is 28474931. The reversal of 28474930 is 3947482.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25492401 + 2982529 = 5049^2 + 1727^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28474930.

It is not an unprimeable number, because it can be changed into a prime (28474931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122094 + ... + 122326.

Almost surely, 2^28474930 is an apocalyptic number.

28474930 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28474930 is a wasteful number, since it uses less digits than its factorization.

28474930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28474930 is about 5336.1905888002. The cubic root of 28474930 is about 305.3661463161.

It can be divided in two parts, 2847 and 4930, that added together give a palindrome (7777).

The spelling of 28474930 in words is "twenty-eight million, four hundred seventy-four thousand, nine hundred thirty".