1812428 has 6 divisors (see below), whose sum is σ = 3171756. Its totient is φ = 906212.

The previous prime is 1812409. The next prime is 1812431. The reversal of 1812428 is 8242181.

It is a junction number, because it is equal to n+sod(n) for n = 1812397 and 1812406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226550 + ... + 226557.

It is an arithmetic number, because the mean of its divisors is an integer number (528626).

2^1812428 is an apocalyptic number.

It is an amenable number.

1812428 is a deficient number, since it is larger than the sum of its proper divisors (1359328).

1812428 is a wasteful number, since it uses less digits than its factorization.

1812428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453111 (or 453109 counting only the distinct ones).

The product of its digits is 1024, while the sum is 26.

The square root of 1812428 is about 1346.2644613894. The cubic root of 1812428 is about 121.9233595506.

The spelling of 1812428 in words is "one million, eight hundred twelve thousand, four hundred twenty-eight".