275304420 has 144 divisors (see below), whose sum is σ = 890006208. Its totient is φ = 71383680.

The previous prime is 275304413. The next prime is 275304437. The reversal of 275304420 is 24403572.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179055 + ... + 180585.

Almost surely, 2^275304420 is an apocalyptic number.

275304420 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 275304420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445003104).

275304420 is an abundant number, since it is smaller than the sum of its proper divisors (614701788).

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

275304420 is a wasteful number, since it uses less digits than its factorization.

275304420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1578 counting only the distinct ones).

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

The square root of 275304420 is about 16592.3000213955. The cubic root of 275304420 is about 650.5355901189.

Adding to 275304420 its reverse (24403572), we get a palindrome (299707992).

The spelling of 275304420 in words is "two hundred seventy-five million, three hundred four thousand, four hundred twenty".