63540720 has 160 divisors (see below), whose sum is σ = 228556800. Its totient is φ = 16194816.

The previous prime is 63540709. The next prime is 63540739. The reversal of 63540720 is 2704536.

It is a happy number.

63540720 is a `hidden beast` number, since 635 + 4 + 0 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49041 + ... + 50319.

It is an arithmetic number, because the mean of its divisors is an integer number (1428480).

Almost surely, 2^63540720 is an apocalyptic number.

63540720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63540720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114278400).

63540720 is an abundant number, since it is smaller than the sum of its proper divisors (165016080).

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

63540720 is a wasteful number, since it uses less digits than its factorization.

63540720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 63540720 is about 7971.2433158197. The cubic root of 63540720 is about 399.0408686726.

The spelling of 63540720 in words is "sixty-three million, five hundred forty thousand, seven hundred twenty".