1622440 has 32 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 634432.

The previous prime is 1622437. The next prime is 1622449. The reversal of 1622440 is 442261.

It is not an unprimeable number, because it can be changed into a prime (1622449) 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, 1449 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^1622440 is an apocalyptic number.

1622440 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 1622440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866240).

1622440 is an abundant number, since it is smaller than the sum of its proper divisors (2110040).

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

1622440 is a wasteful number, since it uses less digits than its factorization.

1622440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1622440 is about 1273.7503680078. The cubic root of 1622440 is about 117.5049643293.

The spelling of 1622440 in words is "one million, six hundred twenty-two thousand, four hundred forty".