626604640 has 96 divisors (see below), whose sum is σ = 1582773696. Its totient is φ = 233840640.

The previous prime is 626604631. The next prime is 626604647. The reversal of 626604640 is 46406626.

It is a junction number, because it is equal to n+sod(n) for n = 626604596 and 626604605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626604647) 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 15 ways as a sum of consecutive naturals, for example, 148804 + ... + 152956.

It is an arithmetic number, because the mean of its divisors is an integer number (16487226).

Almost surely, 2^626604640 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 626604640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791386848).

626604640 is an abundant number, since it is smaller than the sum of its proper divisors (956169056).

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

626604640 is a wasteful number, since it uses less digits than its factorization.

626604640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232 (or 4224 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 626604640 is about 25032.0722274445. The cubic root of 626604640 is about 855.7190535780.

The spelling of 626604640 in words is "six hundred twenty-six million, six hundred four thousand, six hundred forty".