626368428 has 72 divisors (see below), whose sum is σ = 1816109568. Its totient is φ = 178309728.

The previous prime is 626368411. The next prime is 626368433. The reversal of 626368428 is 824863626.

626368428 is a `hidden beast` number, since 6 + 2 + 636 + 8 + 4 + 2 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66925 + ... + 75707.

It is an arithmetic number, because the mean of its divisors is an integer number (25223744).

Almost surely, 2^626368428 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 626368428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908054784).

626368428 is an abundant number, since it is smaller than the sum of its proper divisors (1189741140).

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

626368428 is a wasteful number, since it uses less digits than its factorization.

626368428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083 (or 9078 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 626368428 is about 25027.3535956161. The cubic root of 626368428 is about 855.6115128733.

It can be divided in two parts, 6263 and 68428, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 626368428 in words is "six hundred twenty-six million, three hundred sixty-eight thousand, four hundred twenty-eight".