1820396 has 6 divisors (see below), whose sum is σ = 3185700. Its totient is φ = 910196.

The previous prime is 1820389. The next prime is 1820407. The reversal of 1820396 is 6930281.

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, 227546 + ... + 227553.

It is an arithmetic number, because the mean of its divisors is an integer number (530950).

2^1820396 is an apocalyptic number.

It is an amenable number.

1820396 is a deficient number, since it is larger than the sum of its proper divisors (1365304).

1820396 is a wasteful number, since it uses less digits than its factorization.

1820396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455103 (or 455101 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1820396 is about 1349.2205157053. The cubic root of 1820396 is about 122.1017694231.

The spelling of 1820396 in words is "one million, eight hundred twenty thousand, three hundred ninety-six".