1722379680 has 192 divisors, whose sum is σ = 6889639680. Its totient is φ = 393679872.

The previous prime is 1722379657. The next prime is 1722379721. The reversal of 1722379680 is 869732271.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1762 + ... + 58718.

It is an arithmetic number, because the mean of its divisors is an integer number (35883540).

Almost surely, 2^1722379680 is an apocalyptic number.

1722379680 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 1722379680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3444819840).

1722379680 is an abundant number, since it is smaller than the sum of its proper divisors (5167260000).

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

1722379680 is a wasteful number, since it uses less digits than its factorization.

1722379680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56988 (or 56974 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1722379680 is about 41501.5623802285. The cubic root of 1722379680 is about 1198.6975869449.

The spelling of 1722379680 in words is "one billion, seven hundred twenty-two million, three hundred seventy-nine thousand, six hundred eighty".