134668640 has 48 divisors (see below), whose sum is σ = 319742640. Its totient is φ = 53598720.

The previous prime is 134668591. The next prime is 134668687. The reversal of 134668640 is 46866431.

It is a junction number, because it is equal to n+sod(n) for n = 134668594 and 134668603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31766 + ... + 35754.

It is an arithmetic number, because the mean of its divisors is an integer number (6661305).

Almost surely, 2^134668640 is an apocalyptic number.

134668640 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 134668640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159871320).

134668640 is an abundant number, since it is smaller than the sum of its proper divisors (185074000).

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

134668640 is a wasteful number, since it uses less digits than its factorization.

134668640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 134668640 is about 11604.6818138198. The cubic root of 134668640 is about 512.5727233704.

The spelling of 134668640 in words is "one hundred thirty-four million, six hundred sixty-eight thousand, six hundred forty".