136642988 has 6 divisors (see below), whose sum is σ = 239125236. Its totient is φ = 68321492.

The previous prime is 136642981. The next prime is 136643011. The reversal of 136642988 is 889246631.

It is not an unprimeable number, because it can be changed into a prime (136642981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17080370 + ... + 17080377.

It is an arithmetic number, because the mean of its divisors is an integer number (39854206).

Almost surely, 2^136642988 is an apocalyptic number.

It is an amenable number.

136642988 is a deficient number, since it is larger than the sum of its proper divisors (102482248).

136642988 is a wasteful number, since it uses less digits than its factorization.

136642988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34160751 (or 34160749 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 136642988 is about 11689.4391653321. The cubic root of 136642988 is about 515.0654870065.

The spelling of 136642988 in words is "one hundred thirty-six million, six hundred forty-two thousand, nine hundred eighty-eight".