1838183840 has 48 divisors (see below), whose sum is σ = 4385745000. Its totient is φ = 727987200.

The previous prime is 1838183827. The next prime is 1838183857. The reversal of 1838183840 is 483818381.

It can be written as a sum of positive squares in 4 ways, for example, as 1611861904 + 226321936 = 40148^2 + 15044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1838183791 and 1838183800.

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, 40715 + ... + 73034.

Almost surely, 2^1838183840 is an apocalyptic number.

1838183840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838183840 is an abundant number, since it is smaller than the sum of its proper divisors (2547561160).

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

1838183840 is a wasteful number, since it uses less digits than its factorization.

1838183840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113865 (or 113857 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 1838183840 is about 42874.0462284585. The cubic root of 1838183840 is about 1224.9818328557.

The spelling of 1838183840 in words is "one billion, eight hundred thirty-eight million, one hundred eighty-three thousand, eight hundred forty".