422740 has 24 divisors (see below), whose sum is σ = 927360. Its totient is φ = 161568.

The previous prime is 422711. The next prime is 422749. The reversal of 422740 is 47224.

422740 is a nontrivial binomial coefficient, being equal to C(920, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (38640).

2⁴²²⁷⁴⁰ is an apocalyptic number.

422740 is the 919-th triangular number and also the 460-th hexagonal number.

422740 is the 307-th centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463680).

422740 is an abundant number, since it is smaller than the sum of its proper divisors (504620).

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

422740 is a wasteful number, since it uses less digits than its factorization.

422740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 422740 is about 650.1845891745. The cubic root of 422740 is about 75.0512242656.

Adding to 422740 its reverse (47224), we get a palindrome (469964).

The spelling of 422740 in words is "four hundred twenty-two thousand, seven hundred forty", and thus it is an iban number.