136240 has 40 divisors (see below), whose sum is σ = 343728. Its totient is φ = 49920.

The previous prime is 136237. The next prime is 136247. The reversal of 136240 is 42631.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×136240² = 37122675200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975 + ... + 1105.

2¹³⁶²⁴⁰ is an apocalyptic number.

136240 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 136240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171864).

136240 is an abundant number, since it is smaller than the sum of its proper divisors (207488).

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

136240 is a wasteful number, since it uses less digits than its factorization.

136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 136240 is about 369.1070305481. The cubic root of 136240 is about 51.4558644079.

136240 divided by its sum of digits (16) gives a triangular number (8515 = T₁₃₀).

Adding to 136240 its reverse (42631), we get a palindrome (178871).

It can be divided in two parts, 136 and 240, that multiplied together give a triangular number (32640 = T₂₅₅).

The spelling of 136240 in words is "one hundred thirty-six thousand, two hundred forty".