135321690 has 64 divisors (see below), whose sum is σ = 374077440. Its totient is φ = 30688320.

The previous prime is 135321677. The next prime is 135321701. The reversal of 135321690 is 96123531.

It is a super-2 number, since 2×135321690² = 36623919568912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25051 + ... + 29969.

It is an arithmetic number, because the mean of its divisors is an integer number (5844960).

Almost surely, 2^135321690 is an apocalyptic number.

135321690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135321690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187038720).

135321690 is an abundant number, since it is smaller than the sum of its proper divisors (238755750).

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

135321690 is a wasteful number, since it uses less digits than its factorization.

135321690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 135321690 is about 11632.7851351256. The cubic root of 135321690 is about 513.3999290486.

The spelling of 135321690 in words is "one hundred thirty-five million, three hundred twenty-one thousand, six hundred ninety".