63139680 has 144 divisors (see below), whose sum is σ = 217591920. Its totient is φ = 16671744.

The previous prime is 63139639. The next prime is 63139691. The reversal of 63139680 is 8693136.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234586 + ... + 234854.

It is an arithmetic number, because the mean of its divisors is an integer number (1511055).

Almost surely, 2^63139680 is an apocalyptic number.

63139680 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 63139680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108795960).

63139680 is an abundant number, since it is smaller than the sum of its proper divisors (154452240).

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

63139680 is a wasteful number, since it uses less digits than its factorization.

63139680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 63139680 is about 7946.0480743575. The cubic root of 63139680 is about 398.1995749998.

The spelling of 63139680 in words is "sixty-three million, one hundred thirty-nine thousand, six hundred eighty".