275491216 has 160 divisors (see below), whose sum is σ = 727953408. Its totient is φ = 97528320.

The previous prime is 275491211. The next prime is 275491219. The reversal of 275491216 is 612194572.

It is not an unprimeable number, because it can be changed into a prime (275491211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1649565 + ... + 1649731.

Almost surely, 2^275491216 is an apocalyptic number.

275491216 is a gapful number since it is divisible by the number (26) 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 275491216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363976704).

275491216 is an abundant number, since it is smaller than the sum of its proper divisors (452462192).

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

275491216 is a wasteful number, since it uses less digits than its factorization.

275491216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 303 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 275491216 is about 16597.9280634662. The cubic root of 275491216 is about 650.6826878576.

The spelling of 275491216 in words is "two hundred seventy-five million, four hundred ninety-one thousand, two hundred sixteen".