1840921972 has 12 divisors (see below), whose sum is σ = 3332703780. Its totient is φ = 888720896.

The previous prime is 1840921963. The next prime is 1840921997. The reversal of 1840921972 is 2791290481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1165129956 + 675792016 = 34134^2 + 25996^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7934893 + ... + 7935124.

It is an arithmetic number, because the mean of its divisors is an integer number (277725315).

Almost surely, 2^1840921972 is an apocalyptic number.

It is an amenable number.

1840921972 is a deficient number, since it is larger than the sum of its proper divisors (1491781808).

1840921972 is a wasteful number, since it uses less digits than its factorization.

1840921972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15870050 (or 15870048 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1840921972 is about 42905.9666247015. The cubic root of 1840921972 is about 1225.5897694909.

The spelling of 1840921972 in words is "one billion, eight hundred forty million, nine hundred twenty-one thousand, nine hundred seventy-two".