1164812220 has 324 divisors, whose sum is σ = 4245715656. Its totient is φ = 256239360.

The previous prime is 1164812203. The next prime is 1164812237. The reversal of 1164812220 is 222184611.

1164812220 is a `hidden beast` number, since 1 + 1 + 648 + 12 + 2 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1164812203) and next prime (1164812237).

It is a super-2 number, since 2×1164812220² = 2713575015722656800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 107 ways as a sum of consecutive naturals, for example, 19742551 + ... + 19742609.

Almost surely, 2^1164812220 is an apocalyptic number.

1164812220 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 1164812220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122857828).

1164812220 is an abundant number, since it is smaller than the sum of its proper divisors (3080903436).

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

1164812220 is a wasteful number, since it uses less digits than its factorization.

1164812220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1164812220 is about 34129.3454376142. The cubic root of 1164812220 is about 1052.1685251469.

Adding to 1164812220 its reverse (222184611), we get a palindrome (1386996831).

The spelling of 1164812220 in words is "one billion, one hundred sixty-four million, eight hundred twelve thousand, two hundred twenty".