136532240 has 80 divisors (see below), whose sum is σ = 348446448. Its totient is φ = 49440768.

The previous prime is 136532191. The next prime is 136532251. The reversal of 136532240 is 42235631.

It can be written as a sum of positive squares in 8 ways, for example, as 3083536 + 133448704 = 1756^2 + 11552^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 53882 + ... + 56358.

Almost surely, 2^136532240 is an apocalyptic number.

136532240 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 136532240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174223224).

136532240 is an abundant number, since it is smaller than the sum of its proper divisors (211914208).

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

136532240 is a wasteful number, since it uses less digits than its factorization.

136532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 136532240 is about 11684.7011087148. The cubic root of 136532240 is about 514.9262973046.

Adding to 136532240 its reverse (42235631), we get a palindrome (178767871).

The spelling of 136532240 in words is "one hundred thirty-six million, five hundred thirty-two thousand, two hundred forty".