28445930 has 16 divisors (see below), whose sum is σ = 54214920. Its totient is φ = 10708992.

The previous prime is 28445899. The next prime is 28445939. The reversal of 28445930 is 3954482.

It can be written as a sum of positive squares in 4 ways, for example, as 22458121 + 5987809 = 4739^2 + 2447^2 .

It is not an unprimeable number, because it can be changed into a prime (28445939) 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, 83495 + ... + 83834.

Almost surely, 2^28445930 is an apocalyptic number.

28445930 is a deficient number, since it is larger than the sum of its proper divisors (25768990).

28445930 is a wasteful number, since it uses less digits than its factorization.

28445930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167353.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28445930 is about 5333.4726023483. The cubic root of 28445930 is about 305.2624454319.

The spelling of 28445930 in words is "twenty-eight million, four hundred forty-five thousand, nine hundred thirty".