136520420 has 24 divisors (see below), whose sum is σ = 287683704. Its totient is φ = 54419456.

The previous prime is 136520401. The next prime is 136520437. The reversal of 136520420 is 24025631.

It can be written as a sum of positive squares in 4 ways, for example, as 17623204 + 118897216 = 4198^2 + 10904^2 .

It is a super-3 number, since 3×136520420³ (a number of 25 digits) contains 333 as substring.

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, 5789 + ... + 17508.

It is an arithmetic number, because the mean of its divisors is an integer number (11986821).

Almost surely, 2^136520420 is an apocalyptic number.

136520420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136520420 is an abundant number, since it is smaller than the sum of its proper divisors (151163284).

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

136520420 is a wasteful number, since it uses less digits than its factorization.

136520420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23599 (or 23597 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 136520420 is about 11684.1953081930. The cubic root of 136520420 is about 514.9114373114.

The spelling of 136520420 in words is "one hundred thirty-six million, five hundred twenty thousand, four hundred twenty".