134888440 has 64 divisors (see below), whose sum is σ = 315544320. Its totient is φ = 51840000.

The previous prime is 134888437. The next prime is 134888441. The reversal of 134888440 is 44888431.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 134888393 and 134888402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134888441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224140 + ... + 224740.

It is an arithmetic number, because the mean of its divisors is an integer number (4930380).

Almost surely, 2^134888440 is an apocalyptic number.

134888440 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 134888440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157772160).

134888440 is an abundant number, since it is smaller than the sum of its proper divisors (180655880).

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

134888440 is a wasteful number, since it uses less digits than its factorization.

134888440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 134888440 is about 11614.1482683837. The cubic root of 134888440 is about 512.8514377154.

Subtracting from 134888440 its reverse (44888431), we obtain a palindrome (90000009).

The spelling of 134888440 in words is "one hundred thirty-four million, eight hundred eighty-eight thousand, four hundred forty".