136221760 has 56 divisors (see below), whose sum is σ = 326669400. Its totient is φ = 54104064.

The previous prime is 136221749. The next prime is 136221793. The reversal of 136221760 is 67122631.

136221760 = T₄₁ + T₄₂ + ... + T₉₃₄.

It can be written as a sum of positive squares in 4 ways, for example, as 4981824 + 131239936 = 2232^2 + 11456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46252 + ... + 49108.

Almost surely, 2^136221760 is an apocalyptic number.

136221760 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 136221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163334700).

136221760 is an abundant number, since it is smaller than the sum of its proper divisors (190447640).

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

136221760 is a wasteful number, since it uses less digits than its factorization.

136221760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 136221760 is about 11671.4077985477. The cubic root of 136221760 is about 514.5356797794.

The spelling of 136221760 in words is "one hundred thirty-six million, two hundred twenty-one thousand, seven hundred sixty".