1938988798 has 32 divisors (see below), whose sum is σ = 3108096000. Its totient is φ = 904569120.

The previous prime is 1938988787. The next prime is 1938988801. The reversal of 1938988798 is 8978898391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2127963 + ... + 2128873.

It is an arithmetic number, because the mean of its divisors is an integer number (97128000).

Almost surely, 2^1938988798 is an apocalyptic number.

1938988798 is a deficient number, since it is larger than the sum of its proper divisors (1169107202).

1938988798 is a wasteful number, since it uses less digits than its factorization.

1938988798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its digits is 62705664, while the sum is 70.

The square root of 1938988798 is about 44033.9505154829. The cubic root of 1938988798 is about 1246.9769718409.

The spelling of 1938988798 in words is "one billion, nine hundred thirty-eight million, nine hundred eighty-eight thousand, seven hundred ninety-eight".