240686136 has 144 divisors (see below), whose sum is σ = 711196200. Its totient is φ = 73479168.

The previous prime is 240686111. The next prime is 240686141. The reversal of 240686136 is 631686042.

It is a super-2 number, since 2×240686136² = 115859632125220992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 240686136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 894610 + ... + 894878.

Almost surely, 2^240686136 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 240686136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355598100).

240686136 is an abundant number, since it is smaller than the sum of its proper divisors (470510064).

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

240686136 is a wasteful number, since it uses less digits than its factorization.

240686136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 240686136 is about 15514.0625240457. The cubic root of 240686136 is about 622.0381555224.

The spelling of 240686136 in words is "two hundred forty million, six hundred eighty-six thousand, one hundred thirty-six".