1213060320 has 192 divisors, whose sum is σ = 4469472000. Its totient is φ = 306436608.

The previous prime is 1213060249. The next prime is 1213060327. The reversal of 1213060320 is 230603121.

1213060320 is a `hidden beast` number, since 12 + 1 + 30 + 603 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1213060293 and 1213060302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213060327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74691 + ... + 89469.

It is an arithmetic number, because the mean of its divisors is an integer number (23278500).

Almost surely, 2^1213060320 is an apocalyptic number.

1213060320 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 1213060320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234736000).

1213060320 is an abundant number, since it is smaller than the sum of its proper divisors (3256411680).

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

1213060320 is a wasteful number, since it uses less digits than its factorization.

1213060320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822 (or 14808 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213060320 is about 34829.0154899618. The cubic root of 1213060320 is about 1066.4998506491.

Adding to 1213060320 its reverse (230603121), we get a palindrome (1443663441).

The spelling of 1213060320 in words is "one billion, two hundred thirteen million, sixty thousand, three hundred twenty".