63307920 has 160 divisors (see below), whose sum is σ = 214486272. Its totient is φ = 15353856.

The previous prime is 63307901. The next prime is 63307969. The reversal of 63307920 is 2970336.

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 31 ways as a sum of consecutive naturals, for example, 321262 + ... + 321458.

Almost surely, 2^63307920 is an apocalyptic number.

63307920 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 63307920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107243136).

63307920 is an abundant number, since it is smaller than the sum of its proper divisors (151178352).

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

63307920 is a wasteful number, since it uses less digits than its factorization.

63307920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

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

The square root of 63307920 is about 7956.6274262403. The cubic root of 63307920 is about 398.5529380084.

The spelling of 63307920 in words is "sixty-three million, three hundred seven thousand, nine hundred twenty".