1152631220 has 48 divisors (see below), whose sum is σ = 2624302800. Its totient is φ = 422716416.

The previous prime is 1152631201. The next prime is 1152631231. The reversal of 1152631220 is 221362511.

It can be written as a sum of positive squares in 8 ways, for example, as 31854736 + 1120776484 = 5644^2 + 33478^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23864 + ... + 53616.

It is an arithmetic number, because the mean of its divisors is an integer number (54672975).

Almost surely, 2^1152631220 is an apocalyptic number.

1152631220 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 1152631220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312151400).

1152631220 is an abundant number, since it is smaller than the sum of its proper divisors (1471671580).

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

1152631220 is a wasteful number, since it uses less digits than its factorization.

1152631220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29924 (or 29922 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1152631220 is about 33950.4229723283. The cubic root of 1152631220 is about 1048.4879885090.

Adding to 1152631220 its reverse (221362511), we get a palindrome (1373993731).

The spelling of 1152631220 in words is "one billion, one hundred fifty-two million, six hundred thirty-one thousand, two hundred twenty".