134134440 has 128 divisors (see below), whose sum is σ = 441745920. Its totient is φ = 32313600.

The previous prime is 134134439. The next prime is 134134447. The reversal of 134134440 is 44431431.

It is a super-2 number, since 2×134134440² = 35984095988227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 134134440.

It is not an unprimeable number, because it can be changed into a prime (134134447) 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, 405075 + ... + 405405.

It is an arithmetic number, because the mean of its divisors is an integer number (3451140).

Almost surely, 2^134134440 is an apocalyptic number.

134134440 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 134134440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220872960).

134134440 is an abundant number, since it is smaller than the sum of its proper divisors (307611480).

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

134134440 is a wasteful number, since it uses less digits than its factorization.

134134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 134134440 is about 11581.6423705794. The cubic root of 134134440 is about 511.8940719173.

Adding to 134134440 its reverse (44431431), we get a palindrome (178565871).

The spelling of 134134440 in words is "one hundred thirty-four million, one hundred thirty-four thousand, four hundred forty".