1939109928 has 192 divisors, whose sum is σ = 5791564800. Its totient is φ = 539320320.

The previous prime is 1939109899. The next prime is 1939109951. The reversal of 1939109928 is 8299019391.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10152313 + ... + 10152503.

It is an arithmetic number, because the mean of its divisors is an integer number (30164400).

Almost surely, 2^1939109928 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 1939109928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895782400).

1939109928 is an abundant number, since it is smaller than the sum of its proper divisors (3852454872).

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

1939109928 is a wasteful number, since it uses less digits than its factorization.

1939109928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 1939109928 is about 44035.3259100009. The cubic root of 1939109928 is about 1247.0029378110.

The spelling of 1939109928 in words is "one billion, nine hundred thirty-nine million, one hundred nine thousand, nine hundred twenty-eight".