134665440 has 192 divisors, whose sum is σ = 522256896. Its totient is φ = 28403712.

The previous prime is 134665439. The next prime is 134665441. The reversal of 134665440 is 44566431.

It is an interprime number because it is at equal distance from previous prime (134665439) and next prime (134665441).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134665441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42139 + ... + 45221.

It is an arithmetic number, because the mean of its divisors is an integer number (2720088).

Almost surely, 2^134665440 is an apocalyptic number.

134665440 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 134665440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261128448).

134665440 is an abundant number, since it is smaller than the sum of its proper divisors (387591456).

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

134665440 is a wasteful number, since it uses less digits than its factorization.

134665440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121 (or 3113 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 134665440 is about 11604.5439376134. The cubic root of 134665440 is about 512.5686634158.

Subtracting from 134665440 its reverse (44566431), we obtain a palindrome (90099009).

The spelling of 134665440 in words is "one hundred thirty-four million, six hundred sixty-five thousand, four hundred forty".