136404240 has 160 divisors (see below), whose sum is σ = 493420800. Its totient is φ = 31159296.

The previous prime is 136404217. The next prime is 136404259. The reversal of 136404240 is 42404631.

It is a super-2 number, since 2×136404240² = 37212233379955200, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 136404240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81492 + ... + 83148.

It is an arithmetic number, because the mean of its divisors is an integer number (3083880).

Almost surely, 2^136404240 is an apocalyptic number.

136404240 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 136404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246710400).

136404240 is an abundant number, since it is smaller than the sum of its proper divisors (357016560).

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

136404240 is a wasteful number, since it uses less digits than its factorization.

136404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1674 counting only the distinct ones).

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

The square root of 136404240 is about 11679.2225768670. Note that the first 3 decimals coincide. The cubic root of 136404240 is about 514.7653312353.

Adding to 136404240 its reverse (42404631), we get a palindrome (178808871).

The spelling of 136404240 in words is "one hundred thirty-six million, four hundred four thousand, two hundred forty".