623442 has 16 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 200592.

The previous prime is 623437. The next prime is 623477. The reversal of 623442 is 244326.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623442.

It is an unprimeable number.

623442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2⁶²³⁴⁴² is an apocalyptic number.

623442 is an abundant number, since it is smaller than the sum of its proper divisors (666798).

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

623442 is a wasteful number, since it uses less digits than its factorization.

623442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617.

The product of its digits is 1152, while the sum is 21.

The square root of 623442 is about 789.5834344767. The cubic root of 623442 is about 85.4276944186.

Adding to 623442 its reverse (244326), we get a palindrome (867768).

The spelling of 623442 in words is "six hundred twenty-three thousand, four hundred forty-two".