621600012 has 72 divisors (see below), whose sum is σ = 1722040320. Its totient is φ = 187492320.

The previous prime is 621599969. The next prime is 621600013. The reversal of 621600012 is 210006126.

It is a happy number.

621600012 is a `hidden beast` number, since 62 + 1 + 600 + 0 + 1 + 2 = 666.

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

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (621600013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84789 + ... + 91827.

Almost surely, 2^621600012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621600012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861020160).

621600012 is an abundant number, since it is smaller than the sum of its proper divisors (1100440308).

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

621600012 is a wasteful number, since it uses less digits than its factorization.

621600012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7283 (or 7278 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 621600012 is about 24931.9075082513. The cubic root of 621600012 is about 853.4347807586.

Adding to 621600012 its reverse (210006126), we get a palindrome (831606138).

The spelling of 621600012 in words is "six hundred twenty-one million, six hundred thousand, twelve".