28097930 has 32 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 9509760.

The previous prime is 28097921. The next prime is 28097933. The reversal of 28097930 is 3979082.

It is not an unprimeable number, because it can be changed into a prime (28097933) 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, 2990 + ... + 8070.

It is an arithmetic number, because the mean of its divisors is an integer number (1829520).

Almost surely, 2^28097930 is an apocalyptic number.

28097930 is an abundant number, since it is smaller than the sum of its proper divisors (30446710).

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

28097930 is a wasteful number, since it uses less digits than its factorization.

28097930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 28097930 is about 5300.7480604156. The cubic root of 28097930 is about 304.0125009287.

The spelling of 28097930 in words is "twenty-eight million, ninety-seven thousand, nine hundred thirty".