275668240 has 20 divisors (see below), whose sum is σ = 640928844. Its totient is φ = 110267264.

The previous prime is 275668219. The next prime is 275668259. The reversal of 275668240 is 42866572.

It can be written as a sum of positive squares in 2 ways, for example, as 71978256 + 203689984 = 8484^2 + 14272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 275668193 and 275668202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722847 + ... + 1723006.

Almost surely, 2^275668240 is an apocalyptic number.

275668240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275668240 is an abundant number, since it is smaller than the sum of its proper divisors (365260604).

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

275668240 is a wasteful number, since it uses less digits than its factorization.

275668240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445866 (or 3445860 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 275668240 is about 16603.2599208710. The cubic root of 275668240 is about 650.8220290081.

The spelling of 275668240 in words is "two hundred seventy-five million, six hundred sixty-eight thousand, two hundred forty".