63436320 has 72 divisors (see below), whose sum is σ = 216481356. Its totient is φ = 16915968.

The previous prime is 63436273. The next prime is 63436327. The reversal of 63436320 is 2363436.

63436320 is a `hidden beast` number, since 634 + 3 + 6 + 3 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63297936 + 138384 = 7956^2 + 372^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (63436327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20587 + ... + 23466.

Almost surely, 2^63436320 is an apocalyptic number.

63436320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63436320 is an abundant number, since it is smaller than the sum of its proper divisors (153045036).

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

63436320 is a wasteful number, since it uses less digits than its factorization.

63436320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44074 (or 44063 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

The square root of 63436320 is about 7964.6920844437. The cubic root of 63436320 is about 398.8222020505.

Adding to 63436320 its reverse (2363436), we get a palindrome (65799756).

The spelling of 63436320 in words is "sixty-three million, four hundred thirty-six thousand, three hundred twenty".