1722139340 has 24 divisors (see below), whose sum is σ = 3618382320. Its totient is φ = 688495808.

The previous prime is 1722139339. The next prime is 1722139351. The reversal of 1722139340 is 439312271.

It is a junction number, because it is equal to n+sod(n) for n = 1722139297 and 1722139306.

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, 18566 + ... + 61554.

It is an arithmetic number, because the mean of its divisors is an integer number (150765930).

Almost surely, 2^1722139340 is an apocalyptic number.

1722139340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1722139340 is an abundant number, since it is smaller than the sum of its proper divisors (1896242980).

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

1722139340 is a wasteful number, since it uses less digits than its factorization.

1722139340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45001 (or 44999 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1722139340 is about 41498.6667255708. Note that the first 3 decimals coincide. The cubic root of 1722139340 is about 1198.6418291306.

The spelling of 1722139340 in words is "one billion, seven hundred twenty-two million, one hundred thirty-nine thousand, three hundred forty".