1938479839 has 8 divisors (see below), whose sum is σ = 1992875040. Its totient is φ = 1884190176.

The previous prime is 1938479833. The next prime is 1938479849. The reversal of 1938479839 is 9389748391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1938479839 - 2³ = 1938479831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938479831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11622 + ... + 63340.

It is an arithmetic number, because the mean of its divisors is an integer number (249109380).

Almost surely, 2^1938479839 is an apocalyptic number.

1938479839 is a deficient number, since it is larger than the sum of its proper divisors (54395201).

1938479839 is a wasteful number, since it uses less digits than its factorization.

1938479839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52769.

The product of its digits is 11757312, while the sum is 61.

The square root of 1938479839 is about 44028.1709704139. The cubic root of 1938479839 is about 1246.8678572874.

The spelling of 1938479839 in words is "one billion, nine hundred thirty-eight million, four hundred seventy-nine thousand, eight hundred thirty-nine".