1212841880 has 64 divisors (see below), whose sum is σ = 2930230080. Its totient is φ = 450150400.

The previous prime is 1212841879. The next prime is 1212841921. The reversal of 1212841880 is 881482121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212841880.

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, 35720 + ... + 60840.

It is an arithmetic number, because the mean of its divisors is an integer number (45784845).

Almost surely, 2^1212841880 is an apocalyptic number.

1212841880 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 1212841880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465115040).

1212841880 is an abundant number, since it is smaller than the sum of its proper divisors (1717388200).

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

1212841880 is a wasteful number, since it uses less digits than its factorization.

1212841880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25220 (or 25216 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 35.

The square root of 1212841880 is about 34825.8794576677. The cubic root of 1212841880 is about 1066.4358306910.

The spelling of 1212841880 in words is "one billion, two hundred twelve million, eight hundred forty-one thousand, eight hundred eighty".