136605420 has 192 divisors, whose sum is σ = 493516800. Its totient is φ = 30723840.

The previous prime is 136605401. The next prime is 136605451. The reversal of 136605420 is 24506631.

136605420 is a `hidden beast` number, since 1 + 36 + 605 + 4 + 20 = 666.

It is a super-2 number, since 2×136605420² = 37322081546752800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 63 ways as a sum of consecutive naturals, for example, 268126 + ... + 268634.

It is an arithmetic number, because the mean of its divisors is an integer number (2570400).

Almost surely, 2^136605420 is an apocalyptic number.

136605420 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 136605420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246758400).

136605420 is an abundant number, since it is smaller than the sum of its proper divisors (356911380).

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

136605420 is a wasteful number, since it uses less digits than its factorization.

136605420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 136605420 is about 11687.8321343182. The cubic root of 136605420 is about 515.0182794278.

The spelling of 136605420 in words is "one hundred thirty-six million, six hundred five thousand, four hundred twenty".