28197488 has 40 divisors (see below), whose sum is σ = 60103296. Its totient is φ = 12708800.

The previous prime is 28197487. The next prime is 28197503. The reversal of 28197488 is 88479182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197487) 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, 22445 + ... + 23667.

Almost surely, 2^28197488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28197488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30051648).

28197488 is an abundant number, since it is smaller than the sum of its proper divisors (31905808).

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

28197488 is a wasteful number, since it uses less digits than its factorization.

28197488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1367 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 28197488 is about 5310.1306951901. The cubic root of 28197488 is about 304.3711418092.

The spelling of 28197488 in words is "twenty-eight million, one hundred ninety-seven thousand, four hundred eighty-eight".