135021788 has 48 divisors (see below), whose sum is σ = 266112000. Its totient is φ = 59417280.

The previous prime is 135021787. The next prime is 135021797. The reversal of 135021788 is 887120531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135021787) 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, 225113 + ... + 225711.

It is an arithmetic number, because the mean of its divisors is an integer number (5544000).

Almost surely, 2^135021788 is an apocalyptic number.

It is an amenable number.

135021788 is a deficient number, since it is larger than the sum of its proper divisors (131090212).

135021788 is a wasteful number, since it uses less digits than its factorization.

135021788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 135021788 is about 11619.8876070296. The cubic root of 135021788 is about 513.0203802636.

The spelling of 135021788 in words is "one hundred thirty-five million, twenty-one thousand, seven hundred eighty-eight".