1622404 has 12 divisors (see below), whose sum is σ = 3244864. Its totient is φ = 695304.

The previous prime is 1622377. The next prime is 1622407. The reversal of 1622404 is 4042261.

1622404 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1622407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28944 + ... + 28999.

2^1622404 is an apocalyptic number.

1622404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1622404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1622404 is a wasteful number, since it uses less digits than its factorization.

1622404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57954 (or 57952 counting only the distinct ones).

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

The square root of 1622404 is about 1273.7362364320. The cubic root of 1622404 is about 117.5040952247.

Adding to 1622404 its reverse (4042261), we get a palindrome (5664665).

The spelling of 1622404 in words is "one million, six hundred twenty-two thousand, four hundred four".