1868613728 has 24 divisors (see below), whose sum is σ = 3682894320. Its totient is φ = 933275520.

The previous prime is 1868613709. The next prime is 1868613731. The reversal of 1868613728 is 8273168681.

It is a congruent number.

It is an unprimeable number.

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, 2363 + ... + 61178.

It is an arithmetic number, because the mean of its divisors is an integer number (153453930).

Almost surely, 2^1868613728 is an apocalyptic number.

It is an amenable number.

1868613728 is a deficient number, since it is larger than the sum of its proper divisors (1814280592).

1868613728 is an equidigital number, since it uses as much as digits as its factorization.

1868613728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64470 (or 64462 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 1868613728 is about 43227.4649730932. The cubic root of 1868613728 is about 1231.7044534783.

The spelling of 1868613728 in words is "one billion, eight hundred sixty-eight million, six hundred thirteen thousand, seven hundred twenty-eight".