63398720 has 224 divisors, whose sum is σ = 196632576. Its totient is φ = 18892800.

The previous prime is 63398719. The next prime is 63398743. The reversal of 63398720 is 2789336.

It is a tau number, because it is divible by the number of its divisors (224).

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, 763799 + ... + 763881.

It is an arithmetic number, because the mean of its divisors is an integer number (877824).

Almost surely, 2^63398720 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 63398720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98316288).

63398720 is an abundant number, since it is smaller than the sum of its proper divisors (133233856).

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

63398720 is a wasteful number, since it uses less digits than its factorization.

63398720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 63398720 is about 7962.3313168946. The cubic root of 63398720 is about 398.7433897942.

The spelling of 63398720 in words is "sixty-three million, three hundred ninety-eight thousand, seven hundred twenty".