1723690980 has 216 divisors, whose sum is σ = 5947414200. Its totient is φ = 403307520.

The previous prime is 1723690961. The next prime is 1723690993. The reversal of 1723690980 is 890963271.

It can be written as a sum of positive squares in 4 ways, for example, as 599564196 + 1124126784 = 24486^2 + 33528^2 .

It is a super-2 number, since 2×1723690980² = 5942221189066720800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 630256 + ... + 632984.

It is an arithmetic number, because the mean of its divisors is an integer number (27534325).

Almost surely, 2^1723690980 is an apocalyptic number.

1723690980 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 1723690980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2973707100).

1723690980 is an abundant number, since it is smaller than the sum of its proper divisors (4223723220).

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

1723690980 is a wasteful number, since it uses less digits than its factorization.

1723690980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1723690980 is about 41517.3575748746. The cubic root of 1723690980 is about 1199.0017114135.

The spelling of 1723690980 in words is "one billion, seven hundred twenty-three million, six hundred ninety thousand, nine hundred eighty".