135662640 has 40 divisors (see below), whose sum is σ = 420554928. Its totient is φ = 36176640.

The previous prime is 135662629. The next prime is 135662693. The reversal of 135662640 is 46266531.

It is a tau number, because it is divible by the number of its divisors (40).

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, 282391 + ... + 282870.

Almost surely, 2^135662640 is an apocalyptic number.

135662640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135662640 is an abundant number, since it is smaller than the sum of its proper divisors (284892288).

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

135662640 is a wasteful number, since it uses less digits than its factorization.

135662640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565277 (or 565271 counting only the distinct ones).

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

The square root of 135662640 is about 11647.4306179518. The cubic root of 135662640 is about 513.8307466573.

The spelling of 135662640 in words is "one hundred thirty-five million, six hundred sixty-two thousand, six hundred forty".