135986400 has 432 divisors, whose sum is σ = 559370448. Its totient is φ = 30720000.

The previous prime is 135986399. The next prime is 135986437. The reversal of 135986400 is 4689531.

135986400 is a `hidden beast` number, since 1 + 3 + 5 + 9 + 8 + 640 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 1346350 + ... + 1346450.

It is an arithmetic number, because the mean of its divisors is an integer number (1294839).

Almost surely, 2^135986400 is an apocalyptic number.

135986400 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 135986400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279685224).

135986400 is an abundant number, since it is smaller than the sum of its proper divisors (423384048).

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

135986400 is a wasteful number, since it uses less digits than its factorization.

135986400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 135986400 is about 11661.3206799230. The cubic root of 135986400 is about 514.2391756829.

The spelling of 135986400 in words is "one hundred thirty-five million, nine hundred eighty-six thousand, four hundred".