1422440 has 32 divisors (see below), whose sum is σ = 3278880. Its totient is φ = 555072.

The previous prime is 1422439. The next prime is 1422461. The reversal of 1422440 is 442241.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1307 + ... + 2133.

It is an arithmetic number, because the mean of its divisors is an integer number (102465).

2^1422440 is an apocalyptic number.

1422440 is a gapful number since it is divisible by the number (10) 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 1422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639440).

1422440 is an abundant number, since it is smaller than the sum of its proper divisors (1856440).

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

1422440 is a wasteful number, since it uses less digits than its factorization.

1422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1422440 is about 1192.6608906139. The cubic root of 1422440 is about 112.4634284418.

Adding to 1422440 its reverse (442241), we get a palindrome (1864681).

The spelling of 1422440 in words is "one million, four hundred twenty-two thousand, four hundred forty".