28304470 has 16 divisors (see below), whose sum is σ = 51047568. Its totient is φ = 11299680.

The previous prime is 28304459. The next prime is 28304477. The reversal of 28304470 is 7440382.

It is a super-2 number, since 2×28304470² = 1602286043961800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304477) 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, 3232 + ... + 8188.

It is an arithmetic number, because the mean of its divisors is an integer number (3190473).

Almost surely, 2^28304470 is an apocalyptic number.

28304470 is a deficient number, since it is larger than the sum of its proper divisors (22743098).

28304470 is a wasteful number, since it uses less digits than its factorization.

28304470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28304470 is about 5320.1945453150. The cubic root of 28304470 is about 304.7555866862.

The spelling of 28304470 in words is "twenty-eight million, three hundred four thousand, four hundred seventy".