134420440 has 128 divisors (see below), whose sum is σ = 397094400. Its totient is φ = 39674880.

The previous prime is 134420399. The next prime is 134420443. The reversal of 134420440 is 44024431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134420443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57372 + ... + 59668.

It is an arithmetic number, because the mean of its divisors is an integer number (3102300).

Almost surely, 2^134420440 is an apocalyptic number.

134420440 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 134420440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198547200).

134420440 is an abundant number, since it is smaller than the sum of its proper divisors (262673960).

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

134420440 is a wasteful number, since it uses less digits than its factorization.

134420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 134420440 is about 11593.9829221886. The cubic root of 134420440 is about 512.2576319784.

Adding to 134420440 its reverse (44024431), we get a palindrome (178444871).

The spelling of 134420440 in words is "one hundred thirty-four million, four hundred twenty thousand, four hundred forty".