135579438 has 24 divisors (see below), whose sum is σ = 295025328. Its totient is φ = 44997792.

The previous prime is 135579413. The next prime is 135579439. The reversal of 135579438 is 834975531.

135579438 is a `hidden beast` number, since 1 + 3 + 557 + 94 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 135579393 and 135579402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135579439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11970 + ... + 20357.

It is an arithmetic number, because the mean of its divisors is an integer number (12292722).

Almost surely, 2^135579438 is an apocalyptic number.

135579438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

135579438 is an abundant number, since it is smaller than the sum of its proper divisors (159445890).

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

135579438 is a wasteful number, since it uses less digits than its factorization.

135579438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32568 (or 32565 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 135579438 is about 11643.8583811381. The cubic root of 135579438 is about 513.7256809132.

The spelling of 135579438 in words is "one hundred thirty-five million, five hundred seventy-nine thousand, four hundred thirty-eight".