1152280220 has 96 divisors (see below), whose sum is σ = 3107801088. Its totient is φ = 348809472.

The previous prime is 1152280219. The next prime is 1152280223. The reversal of 1152280220 is 220822511.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152280223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28097 + ... + 55623.

It is an arithmetic number, because the mean of its divisors is an integer number (32372928).

Almost surely, 2^1152280220 is an apocalyptic number.

1152280220 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 1152280220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553900544).

1152280220 is an abundant number, since it is smaller than the sum of its proper divisors (1955520868).

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

1152280220 is a wasteful number, since it uses less digits than its factorization.

1152280220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27579 (or 27577 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1152280220 is about 33945.2532764155. The cubic root of 1152280220 is about 1048.3815489586.

The spelling of 1152280220 in words is "one billion, one hundred fifty-two million, two hundred eighty thousand, two hundred twenty".