1838740380 has 24 divisors (see below), whose sum is σ = 5148473232. Its totient is φ = 490330752.

The previous prime is 1838740373. The next prime is 1838740391. The reversal of 1838740380 is 830478381.

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, 15322777 + ... + 15322896.

It is an arithmetic number, because the mean of its divisors is an integer number (214519718).

Almost surely, 2^1838740380 is an apocalyptic number.

1838740380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838740380 is an abundant number, since it is smaller than the sum of its proper divisors (3309732852).

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

1838740380 is a wasteful number, since it uses less digits than its factorization.

1838740380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645685 (or 30645683 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1838740380 is about 42880.5361440363. The cubic root of 1838740380 is about 1225.1054480934.

The spelling of 1838740380 in words is "one billion, eight hundred thirty-eight million, seven hundred forty thousand, three hundred eighty".