623412 has 18 divisors (see below), whose sum is σ = 1575938. Its totient is φ = 207792.

The previous prime is 623401. The next prime is 623417. The reversal of 623412 is 214326.

It is a happy number.

623412 is a `hidden beast` number, since 623 + 41 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 599076 + 24336 = 774^2 + 156^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 6⁶ + 2¹⁵ + 4² + 3⁹ + 1 + 2¹⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8623 + ... + 8694.

2⁶²³⁴¹² is an apocalyptic number.

It is an amenable number.

623412 is an abundant number, since it is smaller than the sum of its proper divisors (952526).

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

623412 is a wasteful number, since it uses less digits than its factorization.

623412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17327 (or 17322 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 623412 is about 789.5644368891. The cubic root of 623412 is about 85.4263241377.

Adding to 623412 its reverse (214326), we get a palindrome (837738).

It can be divided in two parts, 623 and 412, that added together give a triangular number (1035 = T₄₅).

The spelling of 623412 in words is "six hundred twenty-three thousand, four hundred twelve".