1087255220 has 48 divisors (see below), whose sum is σ = 2355998400. Its totient is φ = 421198080.

The previous prime is 1087255201. The next prime is 1087255223. The reversal of 1087255220 is 225527801.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087255223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109211 + ... + 118749.

It is an arithmetic number, because the mean of its divisors is an integer number (49083300).

Almost surely, 2^1087255220 is an apocalyptic number.

1087255220 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 1087255220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177999200).

1087255220 is an abundant number, since it is smaller than the sum of its proper divisors (1268743180).

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

1087255220 is a wasteful number, since it uses less digits than its factorization.

1087255220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9728 (or 9726 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 1087255220 is about 32973.5533420346. The cubic root of 1087255220 is about 1028.2778965276.

The spelling of 1087255220 in words is "one billion, eighty-seven million, two hundred fifty-five thousand, two hundred twenty".