134320640 has 80 divisors (see below), whose sum is σ = 327032640. Its totient is φ = 52899840.

The previous prime is 134320579. The next prime is 134320649. The reversal of 134320640 is 46023431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (134320649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181391 + ... + 182129.

It is an arithmetic number, because the mean of its divisors is an integer number (4087908).

Almost surely, 2^134320640 is an apocalyptic number.

134320640 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 134320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163516320).

134320640 is an abundant number, since it is smaller than the sum of its proper divisors (192712000).

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

134320640 is an frugal number, since it uses more digits than its factorization.

134320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 134320640 is about 11589.6781663686. The cubic root of 134320640 is about 512.1308259436.

The spelling of 134320640 in words is "one hundred thirty-four million, three hundred twenty thousand, six hundred forty".