1813397056 has 21 divisors (see below), whose sum is σ = 3599135931. Its totient is φ = 906528192.

The previous prime is 1813397051. The next prime is 1813397083. The reversal of 1813397056 is 6507933181.

The square root of 1813397056 is 42584.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813397051) by changing a digit.

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 in 2 ways as a sum of consecutive naturals, for example, 338011 + ... + 343333.

Almost surely, 2^1813397056 is an apocalyptic number.

1813397056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1813397056 is the 42584-th square number.

It is an amenable number.

1813397056 is a deficient number, since it is larger than the sum of its proper divisors (1785738875).

1813397056 is an frugal number, since it uses more digits than its factorization.

1813397056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10658 (or 5325 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The cubic root of 1813397056 is about 1219.4508538140.

The spelling of 1813397056 in words is "one billion, eight hundred thirteen million, three hundred ninety-seven thousand, fifty-six".