275423220 has 96 divisors (see below), whose sum is σ = 884567040. Its totient is φ = 71072640.

The previous prime is 275423207. The next prime is 275423261. The reversal of 275423220 is 22324572.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 8514 + ... + 24966.

It is an arithmetic number, because the mean of its divisors is an integer number (9214240).

Almost surely, 2^275423220 is an apocalyptic number.

275423220 is a gapful number since it is divisible by the number (20) 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 275423220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442283520).

275423220 is an abundant number, since it is smaller than the sum of its proper divisors (609143820).

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

275423220 is a wasteful number, since it uses less digits than its factorization.

275423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16502 (or 16494 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 275423220 is about 16595.8796091078. The cubic root of 275423220 is about 650.6291502032.

Adding to 275423220 its reverse (22324572), we get a palindrome (297747792).

The spelling of 275423220 in words is "two hundred seventy-five million, four hundred twenty-three thousand, two hundred twenty".