1821983328 has 96 divisors (see below), whose sum is σ = 5797249920. Its totient is φ = 552113280.

The previous prime is 1821983323. The next prime is 1821983351. The reversal of 1821983328 is 8233891281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821983323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86350 + ... + 105357.

It is an arithmetic number, because the mean of its divisors is an integer number (60388020).

Almost surely, 2^1821983328 is an apocalyptic number.

1821983328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1821983328 is an abundant number, since it is smaller than the sum of its proper divisors (3975266592).

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

1821983328 is a wasteful number, since it uses less digits than its factorization.

1821983328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191737 (or 191723 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1821983328 is about 42684.6966487991. The cubic root of 1821983328 is about 1221.3724874569.

The spelling of 1821983328 in words is "one billion, eight hundred twenty-one million, nine hundred eighty-three thousand, three hundred twenty-eight".