63742720 has 72 divisors (see below), whose sum is σ = 160781040. Its totient is φ = 24145920.

The previous prime is 63742711. The next prime is 63742733. The reversal of 63742720 is 2724736.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23010 + ... + 25630.

It is an arithmetic number, because the mean of its divisors is an integer number (2233070).

Almost surely, 2^63742720 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 63742720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80390520).

63742720 is an abundant number, since it is smaller than the sum of its proper divisors (97038320).

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

63742720 is a wasteful number, since it uses less digits than its factorization.

63742720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661 (or 2647 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 63742720 is about 7983.9038070358. The cubic root of 63742720 is about 399.4632801516.

The spelling of 63742720 in words is "sixty-three million, seven hundred forty-two thousand, seven hundred twenty".