629445520 has 80 divisors (see below), whose sum is σ = 1601236800. Its totient is φ = 228211200.

The previous prime is 629445511. The next prime is 629445529. The reversal of 629445520 is 25544926.

It is an interprime number because it is at equal distance from previous prime (629445511) and next prime (629445529).

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 629445520.

It is not an unprimeable number, because it can be changed into a prime (629445529) 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 15 ways as a sum of consecutive naturals, for example, 369631 + ... + 371329.

It is an arithmetic number, because the mean of its divisors is an integer number (20015460).

Almost surely, 2^629445520 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 629445520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800618400).

629445520 is an abundant number, since it is smaller than the sum of its proper divisors (971791280).

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

629445520 is a wasteful number, since it uses less digits than its factorization.

629445520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 629445520 is about 25088.7528586018. The cubic root of 629445520 is about 857.0103146379.

The spelling of 629445520 in words is "six hundred twenty-nine million, four hundred forty-five thousand, five hundred twenty".