136421444 has 24 divisors (see below), whose sum is σ = 251684160. Its totient is φ = 64522656.

The previous prime is 136421443. The next prime is 136421489. The reversal of 136421444 is 444124631.

It is a super-2 number, since 2×136421444² = 37221620766090272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136421443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84089 + ... + 85695.

It is an arithmetic number, because the mean of its divisors is an integer number (10486840).

Almost surely, 2^136421444 is an apocalyptic number.

It is an amenable number.

136421444 is a deficient number, since it is larger than the sum of its proper divisors (115262716).

136421444 is a wasteful number, since it uses less digits than its factorization.

136421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747 (or 2745 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 136421444 is about 11679.9590752708. The cubic root of 136421444 is about 514.7869719371.

The spelling of 136421444 in words is "one hundred thirty-six million, four hundred twenty-one thousand, four hundred forty-four".