136439868 has 48 divisors (see below), whose sum is σ = 328154624. Its totient is φ = 44089920.

The previous prime is 136439857. The next prime is 136439869. The reversal of 136439868 is 868934631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136439869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215913 + ... + 216543.

Almost surely, 2^136439868 is an apocalyptic number.

It is an amenable number.

136439868 is an abundant number, since it is smaller than the sum of its proper divisors (191714756).

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

136439868 is a wasteful number, since it uses less digits than its factorization.

136439868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1160 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 136439868 is about 11680.7477500372. The cubic root of 136439868 is about 514.8101452447.

The spelling of 136439868 in words is "one hundred thirty-six million, four hundred thirty-nine thousand, eight hundred sixty-eight".