63952640 has 72 divisors (see below), whose sum is σ = 162252720. Its totient is φ = 24068096.

The previous prime is 63952631. The next prime is 63952643. The reversal of 63952640 is 4625936.

It is a self number, because there is not a number n which added to its sum of digits gives 63952640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63952643) 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, 20291 + ... + 23229.

It is an arithmetic number, because the mean of its divisors is an integer number (2253510).

Almost surely, 2^63952640 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 63952640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81126360).

63952640 is an abundant number, since it is smaller than the sum of its proper divisors (98300080).

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

63952640 is a wasteful number, since it uses less digits than its factorization.

63952640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 63952640 is about 7997.0394521973. The cubic root of 63952640 is about 399.9013089855.

The spelling of 63952640 in words is "sixty-three million, nine hundred fifty-two thousand, six hundred forty".