275305530 has 64 divisors (see below), whose sum is σ = 682577280. Its totient is φ = 71011584.

The previous prime is 275305523. The next prime is 275305549. The reversal of 275305530 is 35503572.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218041 + ... + 219299.

It is an arithmetic number, because the mean of its divisors is an integer number (10665270).

Almost surely, 2^275305530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275305530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341288640).

275305530 is an abundant number, since it is smaller than the sum of its proper divisors (407271750).

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

275305530 is a wasteful number, since it uses less digits than its factorization.

275305530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503.

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 275305530 is about 16592.3334706123. Note that the first 3 decimals coincide. The cubic root of 275305530 is about 650.5364644159.

The spelling of 275305530 in words is "two hundred seventy-five million, three hundred five thousand, five hundred thirty".