134404220 has 24 divisors (see below), whose sum is σ = 291355008. Its totient is φ = 52027200.

The previous prime is 134404187. The next prime is 134404223. The reversal of 134404220 is 22404431.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 134404192 and 134404201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134404223) 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 7 ways as a sum of consecutive naturals, for example, 107771 + ... + 109010.

It is an arithmetic number, because the mean of its divisors is an integer number (12139792).

Almost surely, 2^134404220 is an apocalyptic number.

134404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

134404220 is an abundant number, since it is smaller than the sum of its proper divisors (156950788).

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

134404220 is a wasteful number, since it uses less digits than its factorization.

134404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216821 (or 216819 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 134404220 is about 11593.2834003142. The cubic root of 134404220 is about 512.2370270937.

Adding to 134404220 its reverse (22404431), we get a palindrome (156808651).

The spelling of 134404220 in words is "one hundred thirty-four million, four hundred four thousand, two hundred twenty".