12639360 has 128 divisors (see below), whose sum is σ = 41860800. Its totient is φ = 3239936.

The previous prime is 12639359. The next prime is 12639371. The reversal of 12639360 is 6393621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 55567 + ... + 55793.

Almost surely, 2^12639360 is an apocalyptic number.

12639360 is a gapful number since it is divisible by the number (10) 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 12639360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20930400).

12639360 is an abundant number, since it is smaller than the sum of its proper divisors (29221440).

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

12639360 is a wasteful number, since it uses less digits than its factorization.

12639360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 12639360 is about 3555.1877587548. The cubic root of 12639360 is about 232.9387253144.

The spelling of 12639360 in words is "twelve million, six hundred thirty-nine thousand, three hundred sixty".