1308220620 has 144 divisors (see below), whose sum is σ = 4365391968. Its totient is φ = 291701760.

The previous prime is 1308220619. The next prime is 1308220621. The reversal of 1308220620 is 260228031.

It is an interprime number because it is at equal distance from previous prime (1308220619) and next prime (1308220621).

It is a super-2 number, since 2×1308220620² = 3422882381186368800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308220621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115114 + ... + 125966.

It is an arithmetic number, because the mean of its divisors is an integer number (30315222).

Almost surely, 2^1308220620 is an apocalyptic number.

1308220620 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 1308220620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182695984).

1308220620 is an abundant number, since it is smaller than the sum of its proper divisors (3057171348).

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

1308220620 is a wasteful number, since it uses less digits than its factorization.

1308220620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920 (or 10911 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1308220620 is about 36169.3325899166. The cubic root of 1308220620 is about 1093.6885448137.

Adding to 1308220620 its reverse (260228031), we get a palindrome (1568448651).

The spelling of 1308220620 in words is "one billion, three hundred eight million, two hundred twenty thousand, six hundred twenty".