28197030 has 16 divisors (see below), whose sum is σ = 67672944. Its totient is φ = 7519200.

The previous prime is 28196989. The next prime is 28197031. The reversal of 28197030 is 3079182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 939901 = 28197030 / (2 + 8 + 1 + 9 + 7 + 0 + 3 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469921 + ... + 469980.

It is an arithmetic number, because the mean of its divisors is an integer number (4229559).

Almost surely, 2^28197030 is an apocalyptic number.

28197030 is an abundant number, since it is smaller than the sum of its proper divisors (39475914).

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

28197030 is a wasteful number, since it uses less digits than its factorization.

28197030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939911.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 28197030 is about 5310.0875698994. The cubic root of 28197030 is about 304.3694938759.

The spelling of 28197030 in words is "twenty-eight million, one hundred ninety-seven thousand, thirty".