135263388 has 48 divisors (see below), whose sum is σ = 342427680. Its totient is φ = 41309184.

The previous prime is 135263383. The next prime is 135263389. The reversal of 135263388 is 883362531.

135263388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135263383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18208 + ... + 24536.

It is an arithmetic number, because the mean of its divisors is an integer number (7133910).

Almost surely, 2^135263388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135263388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171213840).

135263388 is an abundant number, since it is smaller than the sum of its proper divisors (207164292).

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

135263388 is a wasteful number, since it uses less digits than its factorization.

135263388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486 (or 6484 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 135263388 is about 11630.2789304470. The cubic root of 135263388 is about 513.3261873783.

The spelling of 135263388 in words is "one hundred thirty-five million, two hundred sixty-three thousand, three hundred eighty-eight".