28197080 has 32 divisors (see below), whose sum is σ = 66204000. Its totient is φ = 10788096.

The previous prime is 28197061. The next prime is 28197119. The reversal of 28197080 is 8079182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28197080.

It is a congruent number.

It is an unprimeable number.

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, 14405 + ... + 16244.

It is an arithmetic number, because the mean of its divisors is an integer number (2068875).

Almost surely, 2^28197080 is an apocalyptic number.

28197080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28197080 is an abundant number, since it is smaller than the sum of its proper divisors (38006920).

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

28197080 is a wasteful number, since it uses less digits than its factorization.

28197080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30683 (or 30679 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 28197080 is about 5310.0922779176. The cubic root of 28197080 is about 304.3696737821.

The spelling of 28197080 in words is "twenty-eight million, one hundred ninety-seven thousand, eighty".