67128560 has 40 divisors (see below), whose sum is σ = 157135776. Its totient is φ = 26668800.

The previous prime is 67128553. The next prime is 67128569. The reversal of 67128560 is 6582176.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 67128560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67128569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9302 + ... + 14858.

Almost surely, 2^67128560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67128560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78567888).

67128560 is an abundant number, since it is smaller than the sum of its proper divisors (90007216).

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

67128560 is a wasteful number, since it uses less digits than its factorization.

67128560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721 (or 5715 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 67128560 is about 8193.2020602448. The cubic root of 67128560 is about 406.4144214921.

The spelling of 67128560 in words is "sixty-seven million, one hundred twenty-eight thousand, five hundred sixty".