1721937152 has 72 divisors (see below), whose sum is σ = 3713355240. Its totient is φ = 792207360.

The previous prime is 1721937131. The next prime is 1721937163. The reversal of 1721937152 is 2517391271.

It can be written as a sum of positive squares in 4 ways, for example, as 52070656 + 1669866496 = 7216^2 + 40864^2 .

It is a super-2 number, since 2×1721937152² = 5930135110875742208, which contains 22 as substring.

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, 1400474 + ... + 1401702.

Almost surely, 2^1721937152 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 1721937152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856677620).

1721937152 is an abundant number, since it is smaller than the sum of its proper divisors (1991418088).

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

1721937152 is a wasteful number, since it uses less digits than its factorization.

1721937152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679 (or 1665 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 1721937152 is about 41496.2305758005. The cubic root of 1721937152 is about 1198.5949183932.

The spelling of 1721937152 in words is "one billion, seven hundred twenty-one million, nine hundred thirty-seven thousand, one hundred fifty-two".