629451220 has 24 divisors (see below), whose sum is σ = 1322360424. Its totient is φ = 251682816.

The previous prime is 629451217. The next prime is 629451227. The reversal of 629451220 is 22154926.

It can be written as a sum of positive squares in 4 ways, for example, as 94361796 + 535089424 = 9714^2 + 23132^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629451227) 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 7 ways as a sum of consecutive naturals, for example, 69684 + ... + 78196.

It is an arithmetic number, because the mean of its divisors is an integer number (55098351).

Almost surely, 2^629451220 is an apocalyptic number.

It is an amenable number.

629451220 is an abundant number, since it is smaller than the sum of its proper divisors (692909204).

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

629451220 is a wasteful number, since it uses less digits than its factorization.

629451220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12219 (or 12217 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 629451220 is about 25088.8664550633. The cubic root of 629451220 is about 857.0129015412.

The spelling of 629451220 in words is "six hundred twenty-nine million, four hundred fifty-one thousand, two hundred twenty".