63429640 has 32 divisors (see below), whose sum is σ = 143521560. Its totient is φ = 25228800.

The previous prime is 63429631. The next prime is 63429647. The reversal of 63429640 is 4692436.

63429640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15570916 + 47858724 = 3946^2 + 6918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63429596 and 63429605.

It is not an unprimeable number, because it can be changed into a prime (63429647) 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, 2860 + ... + 11620.

Almost surely, 2^63429640 is an apocalyptic number.

It is an amenable number.

63429640 is an abundant number, since it is smaller than the sum of its proper divisors (80091920).

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

63429640 is a wasteful number, since it uses less digits than its factorization.

63429640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8953 (or 8949 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 63429640 is about 7964.2727226031. The cubic root of 63429640 is about 398.8082025739.

The spelling of 63429640 in words is "sixty-three million, four hundred twenty-nine thousand, six hundred forty".