135973740 has 96 divisors (see below), whose sum is σ = 445294080. Its totient is φ = 30352896.

The previous prime is 135973613. The next prime is 135973741. The reversal of 135973740 is 47379531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (135973741) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 14296 + ... + 21824.

It is an arithmetic number, because the mean of its divisors is an integer number (4638480).

Almost surely, 2^135973740 is an apocalyptic number.

135973740 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 135973740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222647040).

135973740 is an abundant number, since it is smaller than the sum of its proper divisors (309320340).

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

135973740 is a wasteful number, since it uses less digits than its factorization.

135973740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591 (or 7589 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 135973740 is about 11660.7778471250. Note that the first 3 decimals coincide. The cubic root of 135973740 is about 514.2232170528.

The spelling of 135973740 in words is "one hundred thirty-five million, nine hundred seventy-three thousand, seven hundred forty".