1838383840 has 48 divisors (see below), whose sum is σ = 4414404960. Its totient is φ = 723294720.

The previous prime is 1838383831. The next prime is 1838383907. The reversal of 1838383840 is 483838381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84420 + ... + 103939.

It is an arithmetic number, because the mean of its divisors is an integer number (91966770).

Almost surely, 2^1838383840 is an apocalyptic number.

1838383840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838383840 is an abundant number, since it is smaller than the sum of its proper divisors (2576021120).

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

1838383840 is a wasteful number, since it uses less digits than its factorization.

1838383840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188435 (or 188427 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 1838383840 is about 42876.3785784201. The cubic root of 1838383840 is about 1225.0262584959.

The spelling of 1838383840 in words is "one billion, eight hundred thirty-eight million, three hundred eighty-three thousand, eight hundred forty".