1982236556 has 12 divisors (see below), whose sum is σ = 3472228200. Its totient is φ = 990171360.

The previous prime is 1982236547. The next prime is 1982236559. The reversal of 1982236556 is 6556322891.

It is a super-2 number, since 2×1982236556² = 7858523527885482272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1982236556.

It is not an unprimeable number, because it can be changed into a prime (1982236559) 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, 232010 + ... + 240401.

It is an arithmetic number, because the mean of its divisors is an integer number (289352350).

Almost surely, 2^1982236556 is an apocalyptic number.

It is an amenable number.

1982236556 is a deficient number, since it is larger than the sum of its proper divisors (1489991644).

1982236556 is a wasteful number, since it uses less digits than its factorization.

1982236556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473464 (or 473462 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 1982236556 is about 44522.3152587554. The cubic root of 1982236556 is about 1256.1798623714.

The spelling of 1982236556 in words is "one billion, nine hundred eighty-two million, two hundred thirty-six thousand, five hundred fifty-six".