1623424 has 32 divisors (see below), whose sum is σ = 3531240. Its totient is φ = 737280.

The previous prime is 1623421. The next prime is 1623431. The reversal of 1623424 is 4243261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1623395 and 1623404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623421) 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, 832 + ... + 1984.

2^1623424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765620).

1623424 is an abundant number, since it is smaller than the sum of its proper divisors (1907816).

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

1623424 is a wasteful number, since it uses less digits than its factorization.

1623424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1166 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 1623424 is about 1274.1365703880. The cubic root of 1623424 is about 117.5287148773.

Adding to 1623424 its reverse (4243261), we get a palindrome (5866685).

The spelling of 1623424 in words is "one million, six hundred twenty-three thousand, four hundred twenty-four".