2197428 has 12 divisors (see below), whose sum is σ = 5127360. Its totient is φ = 732472.

The previous prime is 2197427. The next prime is 2197453. The reversal of 2197428 is 8247912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91548 + ... + 91571.

It is an arithmetic number, because the mean of its divisors is an integer number (427280).

2^2197428 is an apocalyptic number.

It is an amenable number.

2197428 is an abundant number, since it is smaller than the sum of its proper divisors (2929932).

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

2197428 is a wasteful number, since it uses less digits than its factorization.

2197428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183126 (or 183124 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 2197428 is about 1482.3724228412. The cubic root of 2197428 is about 130.0084412665.

The spelling of 2197428 in words is "two million, one hundred ninety-seven thousand, four hundred twenty-eight".