1864384636 has 12 divisors (see below), whose sum is σ = 3342250800. Its totient is φ = 909455840.

The previous prime is 1864384597. The next prime is 1864384637. The reversal of 1864384636 is 6364834681.

It is a self number, because there is not a number n which added to its sum of digits gives 1864384636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864384637) 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 in 3 ways as a sum of consecutive naturals, for example, 5683936 + ... + 5684263.

It is an arithmetic number, because the mean of its divisors is an integer number (278520900).

Almost surely, 2^1864384636 is an apocalyptic number.

It is an amenable number.

1864384636 is a deficient number, since it is larger than the sum of its proper divisors (1477866164).

1864384636 is a wasteful number, since it uses less digits than its factorization.

1864384636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11368244 (or 11368242 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 49.

The square root of 1864384636 is about 43178.5205397313. The cubic root of 1864384636 is about 1230.7745437763.

The spelling of 1864384636 in words is "one billion, eight hundred sixty-four million, three hundred eighty-four thousand, six hundred thirty-six".