63943340 has 12 divisors (see below), whose sum is σ = 134281056. Its totient is φ = 25577328.

The previous prime is 63943337. The next prime is 63943349. The reversal of 63943340 is 4334936.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 63943297 and 63943306.

It is not an unprimeable number, because it can be changed into a prime (63943349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1598564 + ... + 1598603.

It is an arithmetic number, because the mean of its divisors is an integer number (11190088).

Almost surely, 2^63943340 is an apocalyptic number.

It is an amenable number.

63943340 is an abundant number, since it is smaller than the sum of its proper divisors (70337716).

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

63943340 is a wasteful number, since it uses less digits than its factorization.

63943340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197176 (or 3197174 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 63943340 is about 7996.4579658746. The cubic root of 63943340 is about 399.8819234816.

The spelling of 63943340 in words is "sixty-three million, nine hundred forty-three thousand, three hundred forty".