136486640 has 40 divisors (see below), whose sum is σ = 321692208. Its totient is φ = 53844480.

The previous prime is 136486631. The next prime is 136486657. The reversal of 136486640 is 46684631.

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

It is a junction number, because it is equal to n+sod(n) for n = 136486594 and 136486603.

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, 5846 + ... + 17525.

Almost surely, 2^136486640 is an apocalyptic number.

136486640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136486640 is an abundant number, since it is smaller than the sum of its proper divisors (185205568).

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

136486640 is a wasteful number, since it uses less digits than its factorization.

136486640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23457 (or 23451 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 136486640 is about 11682.7496763390. The cubic root of 136486640 is about 514.8689646831.

The spelling of 136486640 in words is "one hundred thirty-six million, four hundred eighty-six thousand, six hundred forty".