1820332782 has 48 divisors (see below), whose sum is σ = 4070926080. Its totient is φ = 587567376.

The previous prime is 1820332777. The next prime is 1820332807. The reversal of 1820332782 is 2872330281.

It is a happy number.

It is a super-2 number, since 2×1820332782² = 6627222874447719048, which contains 22 as substring.

It is a congruent number.

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 in 23 ways as a sum of consecutive naturals, for example, 58363 + ... + 83945.

It is an arithmetic number, because the mean of its divisors is an integer number (84810960).

Almost surely, 2^1820332782 is an apocalyptic number.

1820332782 is an abundant number, since it is smaller than the sum of its proper divisors (2250593298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820332782 is a wasteful number, since it uses less digits than its factorization.

1820332782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25717 (or 25714 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1820332782 is about 42665.3581023293. The cubic root of 1820332782 is about 1221.0035597254.

The spelling of 1820332782 in words is "one billion, eight hundred twenty million, three hundred thirty-two thousand, seven hundred eighty-two".