28305370 has 32 divisors (see below), whose sum is σ = 52867728. Its totient is φ = 10902528.

The previous prime is 28305359. The next prime is 28305371. The reversal of 28305370 is 7350382.

It can be written as a sum of positive squares in 8 ways, for example, as 19263321 + 9042049 = 4389^2 + 3007^2 .

It is not an unprimeable number, because it can be changed into a prime (28305371) 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, 41472 + ... + 42148.

Almost surely, 2^28305370 is an apocalyptic number.

28305370 is a deficient number, since it is larger than the sum of its proper divisors (24562358).

28305370 is a wasteful number, since it uses less digits than its factorization.

28305370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 28305370 is about 5320.2791280157. The cubic root of 28305370 is about 304.7588167664.

The spelling of 28305370 in words is "twenty-eight million, three hundred five thousand, three hundred seventy".