38643236 has 24 divisors (see below), whose sum is σ = 70237440. Its totient is φ = 18583200.

The previous prime is 38643233. The next prime is 38643271. The reversal of 38643236 is 63234683.

It is a junction number, because it is equal to n+sod(n) for n = 38643196 and 38643205.

It is not an unprimeable number, because it can be changed into a prime (38643233) 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 7 ways as a sum of consecutive naturals, for example, 21326 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (2926560).

Almost surely, 2^38643236 is an apocalyptic number.

It is an amenable number.

38643236 is a deficient number, since it is larger than the sum of its proper divisors (31594204).

38643236 is a wasteful number, since it uses less digits than its factorization.

38643236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1953 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 38643236 is about 6216.3683932019. The cubic root of 38643236 is about 338.0839048027.

The spelling of 38643236 in words is "thirty-eight million, six hundred forty-three thousand, two hundred thirty-six".