1213032320 has 64 divisors (see below), whose sum is σ = 2943291600. Its totient is φ = 477954048.

The previous prime is 1213032307. The next prime is 1213032341. The reversal of 1213032320 is 232303121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 28736 + ... + 57024.

Almost surely, 2^1213032320 is an apocalyptic number.

1213032320 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 1213032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471645800).

1213032320 is an abundant number, since it is smaller than the sum of its proper divisors (1730259280).

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

1213032320 is an equidigital number, since it uses as much as digits as its factorization.

1213032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28375 (or 28363 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1213032320 is about 34828.6135239403. The cubic root of 1213032320 is about 1066.4916448946.

Adding to 1213032320 its reverse (232303121), we get a palindrome (1445335441).

The spelling of 1213032320 in words is "one billion, two hundred thirteen million, thirty-two thousand, three hundred twenty".