134813640 has 128 divisors (see below), whose sum is σ = 440899200. Its totient is φ = 32778240.

The previous prime is 134813639. The next prime is 134813641. The reversal of 134813640 is 46318431.

It is an interprime number because it is at equal distance from previous prime (134813639) and next prime (134813641).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 134813598 and 134813607.

It is not an unprimeable number, because it can be changed into a prime (134813641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138355 + ... + 139325.

It is an arithmetic number, because the mean of its divisors is an integer number (3444525).

Almost surely, 2^134813640 is an apocalyptic number.

134813640 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 134813640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220449600).

134813640 is an abundant number, since it is smaller than the sum of its proper divisors (306085560).

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

134813640 is a wasteful number, since it uses less digits than its factorization.

134813640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 134813640 is about 11610.9276115218. The cubic root of 134813640 is about 512.7566226209.

The spelling of 134813640 in words is "one hundred thirty-four million, eight hundred thirteen thousand, six hundred forty".