136405620 has 288 divisors, whose sum is σ = 493129728. Its totient is φ = 31352832.

The previous prime is 136405613. The next prime is 136405639. The reversal of 136405620 is 26504631.

136405620 is a `hidden beast` number, since 1 + 36 + 4 + 0 + 5 + 620 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1073997 + ... + 1074123.

It is an arithmetic number, because the mean of its divisors is an integer number (1712256).

Almost surely, 2^136405620 is an apocalyptic number.

136405620 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 136405620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246564864).

136405620 is an abundant number, since it is smaller than the sum of its proper divisors (356724108).

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

136405620 is a wasteful number, since it uses less digits than its factorization.

136405620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 167 counting only the distinct ones).

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

The square root of 136405620 is about 11679.2816559924. The cubic root of 136405620 is about 514.7670671876.

The spelling of 136405620 in words is "one hundred thirty-six million, four hundred five thousand, six hundred twenty".