1938942673940 has 24 divisors (see below), whose sum is σ = 4071881125032. Its totient is φ = 775557734400.

The previous prime is 1938942673937. The next prime is 1938942673951. The reversal of 1938942673940 is 493762498391.

It can be written as a sum of positive squares in 4 ways, for example, as 1048055872516 + 890886801424 = 1023746^2 + 943868^2 .

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, 372029 + ... + 2004068.

It is an arithmetic number, because the mean of its divisors is an integer number (169661713543).

Almost surely, 2^{1938942673940} is an apocalyptic number.

1938942673940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938942673940 is an abundant number, since it is smaller than the sum of its proper divisors (2132938451092).

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

1938942673940 is a wasteful number, since it uses less digits than its factorization.

1938942673940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416907 (or 2416905 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 65.

The spelling of 1938942673940 in words is "one trillion, nine hundred thirty-eight billion, nine hundred forty-two million, six hundred seventy-three thousand, nine hundred forty".