63262640 has 80 divisors (see below), whose sum is σ = 169328448. Its totient is φ = 21531648.

The previous prime is 63262607. The next prime is 63262643. The reversal of 63262640 is 4626236.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (63262643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96554 + ... + 97206.

Almost surely, 2^63262640 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 63262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84664224).

63262640 is an abundant number, since it is smaller than the sum of its proper divisors (106065808).

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

63262640 is a wasteful number, since it uses less digits than its factorization.

63262640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 63262640 is about 7953.7814905867. The cubic root of 63262640 is about 398.4578957597.

Adding to 63262640 its reverse (4626236), we get a palindrome (67888876).

The spelling of 63262640 in words is "sixty-three million, two hundred sixty-two thousand, six hundred forty".