63947730 has 256 divisors, whose sum is σ = 212336640. Its totient is φ = 11923200.

The previous prime is 63947707. The next prime is 63947747. The reversal of 63947730 is 3774936.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1360567 + ... + 1360613.

It is an arithmetic number, because the mean of its divisors is an integer number (829440).

Almost surely, 2^63947730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63947730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106168320).

63947730 is an abundant number, since it is smaller than the sum of its proper divisors (148388910).

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

63947730 is a wasteful number, since it uses less digits than its factorization.

63947730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 95256, while the sum is 39.

The square root of 63947730 is about 7996.7324576980. The cubic root of 63947730 is about 399.8910745075.

The spelling of 63947730 in words is "sixty-three million, nine hundred forty-seven thousand, seven hundred thirty".