136940144 has 80 divisors (see below), whose sum is σ = 314741760. Its totient is φ = 57024000.

The previous prime is 136940129. The next prime is 136940149. The reversal of 136940144 is 441049631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 136940144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136940149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103004 + ... + 104324.

It is an arithmetic number, because the mean of its divisors is an integer number (3934272).

Almost surely, 2^136940144 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 136940144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157370880).

136940144 is an abundant number, since it is smaller than the sum of its proper divisors (177801616).

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

136940144 is a wasteful number, since it uses less digits than its factorization.

136940144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 136940144 is about 11702.1427097776. The cubic root of 136940144 is about 515.4385857584.

Adding to 136940144 its reverse (441049631), we get a palindrome (577989775).

The spelling of 136940144 in words is "one hundred thirty-six million, nine hundred forty thousand, one hundred forty-four".