63390720 has 88 divisors (see below), whose sum is σ = 202800384. Its totient is φ = 16900096.

The previous prime is 63390697. The next prime is 63390749. The reversal of 63390720 is 2709336.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 13297 + ... + 17423.

Almost surely, 2^63390720 is an apocalyptic number.

63390720 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 63390720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101400192).

63390720 is an abundant number, since it is smaller than the sum of its proper divisors (139409664).

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

63390720 is a wasteful number, since it uses less digits than its factorization.

63390720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 63390720 is about 7961.8289356152. The cubic root of 63390720 is about 398.7266172090.

The spelling of 63390720 in words is "sixty-three million, three hundred ninety thousand, seven hundred twenty".