1243603680 has 192 divisors, whose sum is σ = 4292725248. Its totient is φ = 300124160.

The previous prime is 1243603651. The next prime is 1243603709. The reversal of 1243603680 is 863063421.

It is an interprime number because it is at equal distance from previous prime (1243603651) and next prime (1243603709).

It is a super-2 number, since 2×1243603680² = 3093100225819084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 1673389 + ... + 1674131.

It is an arithmetic number, because the mean of its divisors is an integer number (22357944).

Almost surely, 2^1243603680 is an apocalyptic number.

1243603680 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 1243603680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2146362624).

1243603680 is an abundant number, since it is smaller than the sum of its proper divisors (3049121568).

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

1243603680 is a wasteful number, since it uses less digits than its factorization.

1243603680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1243603680 is about 35264.7654181904. The cubic root of 1243603680 is about 1075.3768082341.

The spelling of 1243603680 in words is "one billion, two hundred forty-three million, six hundred three thousand, six hundred eighty".