1939398888 has 64 divisors (see below), whose sum is σ = 5566095360. Its totient is φ = 551618496.

The previous prime is 1939398871. The next prime is 1939398961. The reversal of 1939398888 is 8888939391.

It is a super-2 number, since 2×1939398888² = 7522536093551273088, which contains 22 as substring.

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, 11581 + ... + 63347.

It is an arithmetic number, because the mean of its divisors is an integer number (86970240).

Almost surely, 2^1939398888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1939398888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2783047680).

1939398888 is an abundant number, since it is smaller than the sum of its proper divisors (3626696472).

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

1939398888 is a wasteful number, since it uses less digits than its factorization.

1939398888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52006 (or 52002 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 66.

The square root of 1939398888 is about 44038.6067899519. The cubic root of 1939398888 is about 1247.0648762063.

The spelling of 1939398888 in words is "one billion, nine hundred thirty-nine million, three hundred ninety-eight thousand, eight hundred eighty-eight".