275897520 has 240 divisors, whose sum is σ = 980508672. Its totient is φ = 69419520.

The previous prime is 275897507. The next prime is 275897543. The reversal of 275897520 is 25798572.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×275897520² = 152238883084300800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1048909 + ... + 1049171.

Almost surely, 2^275897520 is an apocalyptic number.

275897520 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 275897520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490254336).

275897520 is an abundant number, since it is smaller than the sum of its proper divisors (704611152).

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

275897520 is a wasteful number, since it uses less digits than its factorization.

275897520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 275897520 is about 16610.1631539248. The cubic root of 275897520 is about 651.0024138598.

The spelling of 275897520 in words is "two hundred seventy-five million, eight hundred ninety-seven thousand, five hundred twenty".