2197828 has 12 divisors (see below), whose sum is σ = 4072572. Its totient is φ = 1034240.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197828 is 8287912.

It can be written as a sum of positive squares in 2 ways, for example, as 1272384 + 925444 = 1128^2 + 962^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16093 + ... + 16228.

It is an arithmetic number, because the mean of its divisors is an integer number (339381).

2^2197828 is an apocalyptic number.

It is an amenable number.

2197828 is a deficient number, since it is larger than the sum of its proper divisors (1874744).

2197828 is a wasteful number, since it uses less digits than its factorization.

2197828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32342 (or 32340 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 2197828 is about 1482.5073355636. The cubic root of 2197828 is about 130.0163293097.

It can be divided in two parts, 2197 and 828, that added together give a square (3025 = 55²).

The spelling of 2197828 in words is "two million, one hundred ninety-seven thousand, eight hundred twenty-eight".