274640 has 20 divisors (see below), whose sum is σ = 638724. Its totient is φ = 109824.

The previous prime is 274627. The next prime is 274661. The reversal of 274640 is 46472.

It can be written as a sum of positive squares in 2 ways, for example, as 94864 + 179776 = 308^2 + 424^2 .

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

It is a congruent number.

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, 1637 + ... + 1796.

2²⁷⁴⁶⁴⁰ is an apocalyptic number.

274640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

274640 is an abundant number, since it is smaller than the sum of its proper divisors (364084).

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

274640 is a wasteful number, since it uses less digits than its factorization.

274640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446 (or 3440 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 274640 is about 524.0610651441. The cubic root of 274640 is about 65.0011834104.

The spelling of 274640 in words is "two hundred seventy-four thousand, six hundred forty".