427640 has 16 divisors (see below), whose sum is σ = 962280. Its totient is φ = 171040.

The previous prime is 427621. The next prime is 427681. The reversal of 427640 is 46724.

It is a congruent number.

It is an unprimeable number.

427640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306 + ... + 5385.

2⁴²⁷⁶⁴⁰ is an apocalyptic number.

427640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

427640 is an abundant number, since it is smaller than the sum of its proper divisors (534640).

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

427640 is a wasteful number, since it uses less digits than its factorization.

427640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10702 (or 10698 counting only the distinct ones).

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

The square root of 427640 is about 653.9418934431. The cubic root of 427640 is about 75.3400851929.

The spelling of 427640 in words is "four hundred twenty-seven thousand, six hundred forty".