134420640 has 96 divisors (see below), whose sum is σ = 425912256. Its totient is φ = 35635200.

The previous prime is 134420617. The next prime is 134420641. The reversal of 134420640 is 46024431.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 134420640.

It is not an unprimeable number, because it can be changed into a prime (134420641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91915 + ... + 93365.

It is an arithmetic number, because the mean of its divisors is an integer number (4436586).

Almost surely, 2^134420640 is an apocalyptic number.

134420640 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 134420640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212956128).

134420640 is an abundant number, since it is smaller than the sum of its proper divisors (291491616).

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

134420640 is a wasteful number, since it uses less digits than its factorization.

134420640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 134420640 is about 11593.9915473490. The cubic root of 134420640 is about 512.2578860357.

The spelling of 134420640 in words is "one hundred thirty-four million, four hundred twenty thousand, six hundred forty".