63643340 has 12 divisors (see below), whose sum is σ = 133651056. Its totient is φ = 25457328.

The previous prime is 63643319. The next prime is 63643361. The reversal of 63643340 is 4334636.

It is an interprime number because it is at equal distance from previous prime (63643319) and next prime (63643361).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1591064 + ... + 1591103.

It is an arithmetic number, because the mean of its divisors is an integer number (11137588).

Almost surely, 2^63643340 is an apocalyptic number.

It is an amenable number.

63643340 is an abundant number, since it is smaller than the sum of its proper divisors (70007716).

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

63643340 is a wasteful number, since it uses less digits than its factorization.

63643340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182176 (or 3182174 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 63643340 is about 7977.6776069230. The cubic root of 63643340 is about 399.2555737667.

Adding to 63643340 its reverse (4334636), we get a palindrome (67977976).

The spelling of 63643340 in words is "sixty-three million, six hundred forty-three thousand, three hundred forty".