275505000 has 80 divisors (see below), whose sum is σ = 860724480. Its totient is φ = 73464000.

The previous prime is 275504969. The next prime is 275505001. The reversal of 275505000 is 505572.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (275505001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5817 + ... + 24183.

It is an arithmetic number, because the mean of its divisors is an integer number (10759056).

Almost surely, 2^275505000 is an apocalyptic number.

275505000 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 275505000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430362240).

275505000 is an abundant number, since it is smaller than the sum of its proper divisors (585219480).

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

275505000 is a wasteful number, since it uses less digits than its factorization.

275505000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18396 (or 18377 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 275505000 is about 16598.3432908227. The cubic root of 275505000 is about 650.6935398196.

The spelling of 275505000 in words is "two hundred seventy-five million, five hundred five thousand".