135551440 has 20 divisors (see below), whose sum is σ = 315157284. Its totient is φ = 54220544.

The previous prime is 135551417. The next prime is 135551483. The reversal of 135551440 is 44155531.

It can be written as a sum of positive squares in 2 ways, for example, as 55413136 + 80138304 = 7444^2 + 8952^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 135551399 and 135551408.

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, 847117 + ... + 847276.

Almost surely, 2^135551440 is an apocalyptic number.

135551440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135551440 is an abundant number, since it is smaller than the sum of its proper divisors (179605844).

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

135551440 is a wasteful number, since it uses less digits than its factorization.

135551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694406 (or 1694400 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 135551440 is about 11642.6560543546. The cubic root of 135551440 is about 513.6903159591.

The spelling of 135551440 in words is "one hundred thirty-five million, five hundred fifty-one thousand, four hundred forty".