135820800 has 300 divisors, whose sum is σ = 506520036. Its totient is φ = 35942400.

The previous prime is 135820793. The next prime is 135820877. The reversal of 135820800 is 8028531.

It is a happy number.

135820800 is a `hidden beast` number, since 1 + 3 + 582 + 0 + 80 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (300).

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 29 ways as a sum of consecutive naturals, for example, 1036735 + ... + 1036865.

Almost surely, 2^135820800 is an apocalyptic number.

135820800 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 135820800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253260018).

135820800 is an abundant number, since it is smaller than the sum of its proper divisors (370699236).

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

135820800 is an equidigital number, since it uses as much as digits as its factorization.

135820800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 135820800 is about 11654.2181204918. The cubic root of 135820800 is about 514.0303494119.

The spelling of 135820800 in words is "one hundred thirty-five million, eight hundred twenty thousand, eight hundred".