634322720 has 24 divisors (see below), whose sum is σ = 1498587804. Its totient is φ = 253729024.

The previous prime is 634322693. The next prime is 634322729. The reversal of 634322720 is 27223436.

It can be written as a sum of positive squares in 2 ways, for example, as 548871184 + 85451536 = 23428^2 + 9244^2 .

It is a super-3 number, since 3×634322720³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (634322729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1982099 + ... + 1982418.

Almost surely, 2^634322720 is an apocalyptic number.

It is an amenable number.

634322720 is an abundant number, since it is smaller than the sum of its proper divisors (864265084).

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

634322720 is a wasteful number, since it uses less digits than its factorization.

634322720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964532 (or 3964524 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 634322720 is about 25185.7642329948. The cubic root of 634322720 is about 859.2181103260.

The spelling of 634322720 in words is "six hundred thirty-four million, three hundred twenty-two thousand, seven hundred twenty".