63940 has 24 divisors (see below), whose sum is σ = 141120. Its totient is φ = 24288.

The previous prime is 63929. The next prime is 63949. The reversal of 63940 is 4936.

It is not an unprimeable number, because it can be changed into a prime (63949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (5880).

2⁶³⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70560).

63940 is an abundant number, since it is smaller than the sum of its proper divisors (77180).

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

63940 is a wasteful number, since it uses less digits than its factorization.

63940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 63940 is about 252.8635995947. The cubic root of 63940 is about 39.9874960917.

The spelling of 63940 in words is "sixty-three thousand, nine hundred forty".