67317632 has 32 divisors (see below), whose sum is σ = 136653480. Its totient is φ = 33020416.

The previous prime is 67317631. The next prime is 67317673. The reversal of 67317632 is 23671376.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 67317592 and 67317601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67317631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1823 + ... + 11745.

Almost surely, 2^67317632 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 67317632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68326740).

67317632 is an abundant number, since it is smaller than the sum of its proper divisors (69335848).

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

67317632 is an equidigital number, since it uses as much as digits as its factorization.

67317632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9990 (or 9978 counting only the distinct ones).

The product of its digits is 31752, while the sum is 35.

The square root of 67317632 is about 8204.7322930124. The cubic root of 67317632 is about 406.7956281253.

The spelling of 67317632 in words is "sixty-seven million, three hundred seventeen thousand, six hundred thirty-two".