136420808 has 8 divisors (see below), whose sum is σ = 255789030. Its totient is φ = 68210400.

The previous prime is 136420807. The next prime is 136420831. The reversal of 136420808 is 808024631.

It can be written as a sum of positive squares in only one way, i.e., 103266244 + 33154564 = 10162^2 + 5758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×136420808² = 37221273710745728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136420807) 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 as a sum of consecutive naturals, namely, 8526293 + ... + 8526308.

Almost surely, 2^136420808 is an apocalyptic number.

It is an amenable number.

136420808 is a deficient number, since it is larger than the sum of its proper divisors (119368222).

136420808 is a wasteful number, since it uses less digits than its factorization.

136420808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17052607 (or 17052603 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 136420808 is about 11679.9318491162. The cubic root of 136420808 is about 514.7861719529.

The spelling of 136420808 in words is "one hundred thirty-six million, four hundred twenty thousand, eight hundred eight".