135903444 has 12 divisors (see below), whose sum is σ = 317108064. Its totient is φ = 45301144.

The previous prime is 135903421. The next prime is 135903451. The reversal of 135903444 is 444309531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×135903444² = 36939492182122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5662632 + ... + 5662655.

It is an arithmetic number, because the mean of its divisors is an integer number (26425672).

Almost surely, 2^135903444 is an apocalyptic number.

It is an amenable number.

135903444 is an abundant number, since it is smaller than the sum of its proper divisors (181204620).

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

135903444 is a wasteful number, since it uses less digits than its factorization.

135903444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325294 (or 11325292 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 135903444 is about 11657.7632502981. The cubic root of 135903444 is about 514.1345870317.

The spelling of 135903444 in words is "one hundred thirty-five million, nine hundred three thousand, four hundred forty-four".