136866744 has 96 divisors (see below), whose sum is σ = 442091520. Its totient is φ = 37401408.

The previous prime is 136866739. The next prime is 136866749. The reversal of 136866744 is 447668631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136866739) and next prime (136866749).

It is a super-2 number, since 2×136866744² = 37465011226323072, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 136866744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136866749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5689 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (4605120).

Almost surely, 2^136866744 is an apocalyptic number.

136866744 is a gapful number since it is divisible by the number (14) 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 136866744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221045760).

136866744 is an abundant number, since it is smaller than the sum of its proper divisors (305224776).

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

136866744 is a wasteful number, since it uses less digits than its factorization.

136866744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11849 (or 11842 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 136866744 is about 11699.0061116319. The cubic root of 136866744 is about 515.3464775019.

The spelling of 136866744 in words is "one hundred thirty-six million, eight hundred sixty-six thousand, seven hundred forty-four".