1838319423840 has 144 divisors (see below), whose sum is σ = 6489584665200. Its totient is φ = 473314415616.

The previous prime is 1838319423827. The next prime is 1838319423859. The reversal of 1838319423840 is 483249138381.

It is a happy number.

1838319423840 is a `hidden beast` number, since 1 + 8 + 383 + 194 + 2 + 38 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 21968770 + ... + 22052289.

It is an arithmetic number, because the mean of its divisors is an integer number (45066560175).

Almost surely, 2^{1838319423840} is an apocalyptic number.

1838319423840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838319423840 is an abundant number, since it is smaller than the sum of its proper divisors (4651265241360).

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

1838319423840 is a wasteful number, since it uses less digits than its factorization.

1838319423840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44021109 (or 44021098 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 1838319423840 in words is "one trillion, eight hundred thirty-eight billion, three hundred nineteen million, four hundred twenty-three thousand, eight hundred forty".