134205440 has 52 divisors (see below), whose sum is σ = 322102884. Its totient is φ = 53673984.

The previous prime is 134205403. The next prime is 134205443. The reversal of 134205440 is 44502431.

It can be written as a sum of positive squares in 2 ways, for example, as 46895104 + 87310336 = 6848^2 + 9344^2 .

It is a super-2 number, since 2×134205440² = 36022200251187200, which contains 22 as substring.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134205443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17204 + ... + 23756.

Almost surely, 2^134205440 is an apocalyptic number.

134205440 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 134205440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161051442).

134205440 is an abundant number, since it is smaller than the sum of its proper divisors (187897444).

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

134205440 is an frugal number, since it uses more digits than its factorization.

134205440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582 (or 6560 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 134205440 is about 11584.7071607357. The cubic root of 134205440 is about 511.9843745231.

Adding to 134205440 its reverse (44502431), we get a palindrome (178707871).

The spelling of 134205440 in words is "one hundred thirty-four million, two hundred five thousand, four hundred forty".