1164543220 has 24 divisors (see below), whose sum is σ = 2447472384. Its totient is φ = 465449376.

The previous prime is 1164543173. The next prime is 1164543287. The reversal of 1164543220 is 223454611.

It is a super-2 number, since 2×1164543220² = 2712321822495936800, which contains 22 as substring.

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, 3717 + ... + 48403.

It is an arithmetic number, because the mean of its divisors is an integer number (101978016).

Almost surely, 2^1164543220 is an apocalyptic number.

1164543220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164543220 is an abundant number, since it is smaller than the sum of its proper divisors (1282929164).

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

1164543220 is a wasteful number, since it uses less digits than its factorization.

1164543220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45999 (or 45997 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1164543220 is about 34125.4043199491. The cubic root of 1164543220 is about 1052.0875235002.

Adding to 1164543220 its reverse (223454611), we get a palindrome (1387997831).

The spelling of 1164543220 in words is "one billion, one hundred sixty-four million, five hundred forty-three thousand, two hundred twenty".