28472330 has 16 divisors (see below), whose sum is σ = 51316200. Its totient is φ = 11374272.

The previous prime is 28472329. The next prime is 28472357. The reversal of 28472330 is 3327482.

It can be written as a sum of positive squares in 4 ways, for example, as 22005481 + 6466849 = 4691^2 + 2543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28472293 and 28472302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9896 + ... + 12444.

Almost surely, 2^28472330 is an apocalyptic number.

28472330 is a deficient number, since it is larger than the sum of its proper divisors (22843870).

28472330 is a wasteful number, since it uses less digits than its factorization.

28472330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28472330 is about 5335.9469637544. The cubic root of 28472330 is about 305.3568518695.

The spelling of 28472330 in words is "twenty-eight million, four hundred seventy-two thousand, three hundred thirty".