1938876688 has 30 divisors (see below), whose sum is σ = 4369893486. Its totient is φ = 830946816.

The previous prime is 1938876661. The next prime is 1938876691. The reversal of 1938876688 is 8866788391.

It can be written as a sum of positive squares in only one way, i.e., 1333126144 + 605750544 = 36512^2 + 24612^2 .

It is a super-2 number, since 2×1938876688² = 7518485622539698688, 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 5 ways as a sum of consecutive naturals, for example, 1235745 + ... + 1237312.

Almost surely, 2^1938876688 is an apocalyptic number.

It is an amenable number.

1938876688 is an abundant number, since it is smaller than the sum of its proper divisors (2431016798).

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

1938876688 is a wasteful number, since it uses less digits than its factorization.

1938876688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473079 (or 2473066 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 64.

The square root of 1938876688 is about 44032.6775020552. The cubic root of 1938876688 is about 1246.9529384749.

The spelling of 1938876688 in words is "one billion, nine hundred thirty-eight million, eight hundred seventy-six thousand, six hundred eighty-eight".