136420880 has 40 divisors (see below), whose sum is σ = 319044312. Its totient is φ = 54247424.

The previous prime is 136420859. The next prime is 136420883. The reversal of 136420880 is 88024631.

It can be written as a sum of positive squares in 4 ways, for example, as 30824704 + 105596176 = 5552^2 + 10276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×136420880² = 37221312999948800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136420883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912 + ... + 18768.

Almost surely, 2^136420880 is an apocalyptic number.

136420880 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 136420880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159522156).

136420880 is an abundant number, since it is smaller than the sum of its proper divisors (182623432).

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

136420880 is a wasteful number, since it uses less digits than its factorization.

136420880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043 (or 10037 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 136420880 is about 11679.9349313256. The cubic root of 136420880 is about 514.7862625173.

The spelling of 136420880 in words is "one hundred thirty-six million, four hundred twenty thousand, eight hundred eighty".