134638640 has 40 divisors (see below), whose sum is σ = 331452000. Its totient is φ = 50686976.

The previous prime is 134638627. The next prime is 134638643. The reversal of 134638640 is 46836431.

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 134638640.

It is not an unprimeable number, because it can be changed into a prime (134638643) 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, 48140 + ... + 50859.

It is an arithmetic number, because the mean of its divisors is an integer number (8286300).

Almost surely, 2^134638640 is an apocalyptic number.

134638640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

134638640 is an abundant number, since it is smaller than the sum of its proper divisors (196813360).

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

134638640 is a wasteful number, since it uses less digits than its factorization.

134638640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99029 (or 99023 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 134638640 is about 11603.3891600687. The cubic root of 134638640 is about 512.5346587705.

The spelling of 134638640 in words is "one hundred thirty-four million, six hundred thirty-eight thousand, six hundred forty".