1939664080 has 60 divisors (see below), whose sum is σ = 4625727372. Its totient is φ = 755957760.

The previous prime is 1939664059. The next prime is 1939664201. The reversal of 1939664080 is 804669391.

It can be written as a sum of positive squares in 6 ways, for example, as 386358336 + 1553305744 = 19656^2 + 39412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1939664080.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2521936 + ... + 2522704.

Almost surely, 2^1939664080 is an apocalyptic number.

1939664080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1939664080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312863686).

1939664080 is an abundant number, since it is smaller than the sum of its proper divisors (2686063292).

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

1939664080 is an frugal number, since it uses more digits than its factorization.

1939664080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1939664080 is about 44041.6175906381. The cubic root of 1939664080 is about 1247.1217145319.

The spelling of 1939664080 in words is "one billion, nine hundred thirty-nine million, six hundred sixty-four thousand, eighty".