136005144 has 64 divisors (see below), whose sum is σ = 372487680. Its totient is φ = 41040000.

The previous prime is 136005139. The next prime is 136005167. The reversal of 136005144 is 441500631.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70594 + ... + 72494.

It is an arithmetic number, because the mean of its divisors is an integer number (5820120).

Almost surely, 2^136005144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136005144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186243840).

136005144 is an abundant number, since it is smaller than the sum of its proper divisors (236482536).

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

136005144 is a wasteful number, since it uses less digits than its factorization.

136005144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 136005144 is about 11662.1243347857. The cubic root of 136005144 is about 514.2628017129.

Adding to 136005144 its reverse (441500631), we get a palindrome (577505775).

The spelling of 136005144 in words is "one hundred thirty-six million, five thousand, one hundred forty-four".