1868328772 has 24 divisors (see below), whose sum is σ = 3342568320. Its totient is φ = 913350240.

The previous prime is 1868328757. The next prime is 1868328823. The reversal of 1868328772 is 2778238681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200554 + ... + 209662.

It is an arithmetic number, because the mean of its divisors is an integer number (139273680).

Almost surely, 2^1868328772 is an apocalyptic number.

It is an amenable number.

1868328772 is a deficient number, since it is larger than the sum of its proper divisors (1474239548).

1868328772 is a wasteful number, since it uses less digits than its factorization.

1868328772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251 (or 10249 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 52.

The square root of 1868328772 is about 43224.1688410547. The cubic root of 1868328772 is about 1231.6418403208.

Subtracting 1868328772 from its reverse (2778238681), we obtain a palindrome (909909909).

The spelling of 1868328772 in words is "one billion, eight hundred sixty-eight million, three hundred twenty-eight thousand, seven hundred seventy-two".