623543412 has 12 divisors (see below), whose sum is σ = 1454934656. Its totient is φ = 207847800.

The previous prime is 623543411. The next prime is 623543467. The reversal of 623543412 is 214345326.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 623543412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623543411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25980964 + ... + 25980987.

Almost surely, 2^623543412 is an apocalyptic number.

It is an amenable number.

623543412 is an abundant number, since it is smaller than the sum of its proper divisors (831391244).

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

623543412 is a wasteful number, since it uses less digits than its factorization.

623543412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51961958 (or 51961956 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 623543412 is about 24970.8512470040. The cubic root of 623543412 is about 854.3232619064.

Adding to 623543412 its reverse (214345326), we get a palindrome (837888738).

The spelling of 623543412 in words is "six hundred twenty-three million, five hundred forty-three thousand, four hundred twelve".