1838373840 has 160 divisors (see below), whose sum is σ = 6479763840. Its totient is φ = 478808064.

The previous prime is 1838373833. The next prime is 1838373853. The reversal of 1838373840 is 483738381.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82984 + ... + 102776.

It is an arithmetic number, because the mean of its divisors is an integer number (40498524).

Almost surely, 2^1838373840 is an apocalyptic number.

1838373840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1838373840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3239881920).

1838373840 is an abundant number, since it is smaller than the sum of its proper divisors (4641390000).

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

1838373840 is a wasteful number, since it uses less digits than its factorization.

1838373840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19858 (or 19846 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1838373840 is about 42876.2619639352. The cubic root of 1838373840 is about 1225.0240372904.

The spelling of 1838373840 in words is "one billion, eight hundred thirty-eight million, three hundred seventy-three thousand, eight hundred forty".