28321074 has 24 divisors (see below), whose sum is σ = 61513452. Its totient is φ = 9417120.

The previous prime is 28321063. The next prime is 28321079. The reversal of 28321074 is 47012382.

It can be written as a sum of positive squares in 2 ways, for example, as 27405225 + 915849 = 5235^2 + 957^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28321079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6592 + ... + 10004.

Almost surely, 2^28321074 is an apocalyptic number.

28321074 is an abundant number, since it is smaller than the sum of its proper divisors (33192378).

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

28321074 is a wasteful number, since it uses less digits than its factorization.

28321074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882 (or 3879 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28321074 is about 5321.7547857826. The cubic root of 28321074 is about 304.8151670589.

The spelling of 28321074 in words is "twenty-eight million, three hundred twenty-one thousand, seventy-four".