275345280 has 192 divisors, whose sum is σ = 1086789600. Its totient is φ = 62926848.

The previous prime is 275345237. The next prime is 275345293. The reversal of 275345280 is 82543572.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36906 + ... + 43734.

Almost surely, 2^275345280 is an apocalyptic number.

275345280 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 275345280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543394800).

275345280 is an abundant number, since it is smaller than the sum of its proper divisors (811444320).

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

275345280 is a wasteful number, since it uses less digits than its factorization.

275345280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861 (or 6846 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 275345280 is about 16593.5312697448. The cubic root of 275345280 is about 650.5677721537.

It can be divided in two parts, 275345 and 280, that added together give a square (275625 = 525²).

The spelling of 275345280 in words is "two hundred seventy-five million, three hundred forty-five thousand, two hundred eighty".