1938327780 has 24 divisors (see below), whose sum is σ = 5427317952. Its totient is φ = 516887392.

The previous prime is 1938327779. The next prime is 1938327821. The reversal of 1938327780 is 877238391.

It is a super-2 number, since 2×1938327780² = 7514229165439456800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 16152672 + ... + 16152791.

It is an arithmetic number, because the mean of its divisors is an integer number (226138248).

Almost surely, 2^1938327780 is an apocalyptic number.

1938327780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938327780 is an abundant number, since it is smaller than the sum of its proper divisors (3488990172).

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

1938327780 is a wasteful number, since it uses less digits than its factorization.

1938327780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32305475 (or 32305473 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 1938327780 is about 44026.4440989731. Note that the first 3 decimals coincide. The cubic root of 1938327780 is about 1246.8352540015.

The spelling of 1938327780 in words is "one billion, nine hundred thirty-eight million, three hundred twenty-seven thousand, seven hundred eighty".