136444880 has 80 divisors (see below), whose sum is σ = 372726144. Its totient is φ = 45795840.

The previous prime is 136444879. The next prime is 136444939. The reversal of 136444880 is 88444631.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5477 + ... + 17403.

Almost surely, 2^136444880 is an apocalyptic number.

136444880 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 136444880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186363072).

136444880 is an abundant number, since it is smaller than the sum of its proper divisors (236281264).

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

136444880 is a wasteful number, since it uses less digits than its factorization.

136444880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964 (or 11958 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 136444880 is about 11680.9622891267. The cubic root of 136444880 is about 514.8164488686.

The spelling of 136444880 in words is "one hundred thirty-six million, four hundred forty-four thousand, eight hundred eighty".