623434816 has 28 divisors (see below), whose sum is σ = 1238760540. Its totient is φ = 311306240.

The previous prime is 623434789. The next prime is 623434817. The reversal of 623434816 is 618434326.

It can be written as a sum of positive squares in 2 ways, for example, as 479434816 + 144000000 = 21896^2 + 12000^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (623434817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45756 + ... + 57796.

Almost surely, 2^623434816 is an apocalyptic number.

It is an amenable number.

623434816 is a deficient number, since it is larger than the sum of its proper divisors (615325724).

623434816 is a wasteful number, since it uses less digits than its factorization.

623434816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12862 (or 12852 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 623434816 is about 24968.6766970138. The cubic root of 623434816 is about 854.2736628603.

The spelling of 623434816 in words is "six hundred twenty-three million, four hundred thirty-four thousand, eight hundred sixteen".