36388642 has 4 divisors (see below), whose sum is σ = 54582966. Its totient is φ = 18194320.

The previous prime is 36388633. The next prime is 36388643. The reversal of 36388642 is 24688363.

36388642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24688363 = 7 ⋅3526909.

It can be written as a sum of positive squares in only one way, i.e., 18740241 + 17648401 = 4329^2 + 4201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 36388595 and 36388604.

It is not an unprimeable number, because it can be changed into a prime (36388643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9097159 + ... + 9097162.

Almost surely, 2^36388642 is an apocalyptic number.

36388642 is a deficient number, since it is larger than the sum of its proper divisors (18194324).

36388642 is a wasteful number, since it uses less digits than its factorization.

36388642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18194323.

The product of its digits is 165888, while the sum is 40.

The square root of 36388642 is about 6032.2998930756. The cubic root of 36388642 is about 331.3766852803.

The spelling of 36388642 in words is "thirty-six million, three hundred eighty-eight thousand, six hundred forty-two".