427440 has 80 divisors (see below), whose sum is σ = 1437408. Its totient is φ = 104448.

The previous prime is 427439. The next prime is 427447. The reversal of 427440 is 44724.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3052 + ... + 3188.

2⁴²⁷⁴⁴⁰ is an apocalyptic number.

427440 is a gapful number since it is divisible by the number (40) 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 427440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718704).

427440 is an abundant number, since it is smaller than the sum of its proper divisors (1009968).

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

427440 is a wasteful number, since it uses less digits than its factorization.

427440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 427440 is about 653.7889567743. The cubic root of 427440 is about 75.3283382666.

The spelling of 427440 in words is "four hundred twenty-seven thousand, four hundred forty", and thus it is an iban number.