134400420 has 144 divisors (see below), whose sum is σ = 508330368. Its totient is φ = 27924480.

The previous prime is 134400403. The next prime is 134400439. The reversal of 134400420 is 24004431.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 134400393 and 134400402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9012 + ... + 18708.

It is an arithmetic number, because the mean of its divisors is an integer number (3530072).

Almost surely, 2^134400420 is an apocalyptic number.

134400420 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 134400420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254165184).

134400420 is an abundant number, since it is smaller than the sum of its proper divisors (373929948).

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

134400420 is a wasteful number, since it uses less digits than its factorization.

134400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9730 (or 9725 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 134400420 is about 11593.1195111583. The cubic root of 134400420 is about 512.2321995691.

Adding to 134400420 its reverse (24004431), we get a palindrome (158404851).

The spelling of 134400420 in words is "one hundred thirty-four million, four hundred thousand, four hundred twenty".