1718422640 has 120 divisors (see below), whose sum is σ = 4433247504. Its totient is φ = 618956800.

The previous prime is 1718422639. The next prime is 1718422663. The reversal of 1718422640 is 462248171.

1718422640 = 33² + 34² + ... + 1727².

It is a self number, because there is not a number n which added to its sum of digits gives 1718422640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1093055 + ... + 1094625.

Almost surely, 2^1718422640 is an apocalyptic number.

1718422640 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 1718422640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216623752).

1718422640 is an abundant number, since it is smaller than the sum of its proper divisors (2714824864).

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

1718422640 is a wasteful number, since it uses less digits than its factorization.

1718422640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1718422640 is about 41453.8615812809. The cubic root of 1718422640 is about 1197.7789100210.

The spelling of 1718422640 in words is "one billion, seven hundred eighteen million, four hundred twenty-two thousand, six hundred forty".