135549820 has 24 divisors (see below), whose sum is σ = 325319904. Its totient is φ = 46474176.

The previous prime is 135549811. The next prime is 135549839. The reversal of 135549820 is 28945531.

It is a self number, because there is not a number n which added to its sum of digits gives 135549820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483967 + ... + 484246.

It is an arithmetic number, because the mean of its divisors is an integer number (13554996).

Almost surely, 2^135549820 is an apocalyptic number.

135549820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135549820 is an abundant number, since it is smaller than the sum of its proper divisors (189770084).

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

135549820 is a wasteful number, since it uses less digits than its factorization.

135549820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968229 (or 968227 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 135549820 is about 11642.5864823930. The cubic root of 135549820 is about 513.6882695487.

The spelling of 135549820 in words is "one hundred thirty-five million, five hundred forty-nine thousand, eight hundred twenty".