1213722880 has 72 divisors (see below), whose sum is σ = 3033721152. Its totient is φ = 464369664.

The previous prime is 1213722827. The next prime is 1213722901. The reversal of 1213722880 is 882273121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8827 + ... + 50053.

It is an arithmetic number, because the mean of its divisors is an integer number (42135016).

Almost surely, 2^1213722880 is an apocalyptic number.

1213722880 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 1213722880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516860576).

1213722880 is an abundant number, since it is smaller than the sum of its proper divisors (1819998272).

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

1213722880 is an equidigital number, since it uses as much as digits as its factorization.

1213722880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41271 (or 41257 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1213722880 is about 34838.5258011874. The cubic root of 1213722880 is about 1066.6939854114.

The spelling of 1213722880 in words is "one billion, two hundred thirteen million, seven hundred twenty-two thousand, eight hundred eighty".