63447660 has 72 divisors (see below), whose sum is σ = 195367536. Its totient is φ = 16663680.

The previous prime is 63447653. The next prime is 63447677. The reversal of 63447660 is 6674436.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9430 + ... + 14690.

It is an arithmetic number, because the mean of its divisors is an integer number (2713438).

Almost surely, 2^63447660 is an apocalyptic number.

63447660 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 63447660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97683768).

63447660 is an abundant number, since it is smaller than the sum of its proper divisors (131919876).

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

63447660 is a wasteful number, since it uses less digits than its factorization.

63447660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343 (or 5338 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 63447660 is about 7965.4039445592. The cubic root of 63447660 is about 398.8459653789.

The spelling of 63447660 in words is "sixty-three million, four hundred forty-seven thousand, six hundred sixty".