1155652220 has 12 divisors (see below), whose sum is σ = 2426869704. Its totient is φ = 462260880.

The previous prime is 1155652187. The next prime is 1155652229. The reversal of 1155652220 is 222565511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155652229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28891286 + ... + 28891325.

It is an arithmetic number, because the mean of its divisors is an integer number (202239142).

Almost surely, 2^1155652220 is an apocalyptic number.

1155652220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155652220 is an abundant number, since it is smaller than the sum of its proper divisors (1271217484).

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

1155652220 is a wasteful number, since it uses less digits than its factorization.

1155652220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57782620 (or 57782618 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1155652220 is about 33994.8852035126. The cubic root of 1155652220 is about 1049.4032043213.

The spelling of 1155652220 in words is "one billion, one hundred fifty-five million, six hundred fifty-two thousand, two hundred twenty".