28197012 has 48 divisors (see below), whose sum is σ = 67963392. Its totient is φ = 9093120.

The previous prime is 28196989. The next prime is 28197031. The reversal of 28197012 is 21079182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109588 + ... + 109844.

It is an arithmetic number, because the mean of its divisors is an integer number (1415904).

Almost surely, 2^28197012 is an apocalyptic number.

It is an amenable number.

28197012 is an abundant number, since it is smaller than the sum of its proper divisors (39766380).

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

28197012 is a wasteful number, since it uses less digits than its factorization.

28197012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 28197012 is about 5310.0858750118. The cubic root of 28197012 is about 304.3694291096.

The spelling of 28197012 in words is "twenty-eight million, one hundred ninety-seven thousand, twelve".