623643402 has 16 divisors (see below), whose sum is σ = 1320656832. Its totient is φ = 195652800.

The previous prime is 623643359. The next prime is 623643529. The reversal of 623643402 is 204346326.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 623643402.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3056974 + ... + 3057177.

It is an arithmetic number, because the mean of its divisors is an integer number (82541052).

Almost surely, 2^623643402 is an apocalyptic number.

623643402 is an abundant number, since it is smaller than the sum of its proper divisors (697013430).

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

623643402 is a wasteful number, since it uses less digits than its factorization.

623643402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114173.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 623643402 is about 24972.8533011348. The cubic root of 623643402 is about 854.3689252426.

Adding to 623643402 its reverse (204346326), we get a palindrome (827989728).

The spelling of 623643402 in words is "six hundred twenty-three million, six hundred forty-three thousand, four hundred two".