1662443520 has 224 divisors, whose sum is σ = 5416612992. Its totient is φ = 435290112.

The previous prime is 1662443509. The next prime is 1662443543. The reversal of 1662443520 is 253442661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10198959 + ... + 10199121.

It is an arithmetic number, because the mean of its divisors is an integer number (24181308).

Almost surely, 2^1662443520 is an apocalyptic number.

1662443520 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 1662443520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708306496).

1662443520 is an abundant number, since it is smaller than the sum of its proper divisors (3754169472).

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

1662443520 is an equidigital number, since it uses as much as digits as its factorization.

1662443520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1662443520 is about 40773.0734676698. The cubic root of 1662443520 is about 1184.6288356695.

The spelling of 1662443520 in words is "one billion, six hundred sixty-two million, four hundred forty-three thousand, five hundred twenty".