1208897809920 has 800 divisors, whose sum is σ = 4438256299488. Its totient is φ = 314383859712.

The previous prime is 1208897809913. The next prime is 1208897809921. The reversal of 1208897809920 is 299087988021.

It is a super-2 number, since 2×1208897809920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208897809921) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3483855187 + ... + 3483855533.

Almost surely, 2^{1208897809920} is an apocalyptic number.

1208897809920 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 1208897809920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2219128149744).

1208897809920 is an abundant number, since it is smaller than the sum of its proper divisors (3229358489568).

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

1208897809920 is an equidigital number, since it uses as much as digits as its factorization.

1208897809920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The spelling of 1208897809920 in words is "one trillion, two hundred eight billion, eight hundred ninety-seven million, eight hundred nine thousand, nine hundred twenty".