1684671812 has 24 divisors (see below), whose sum is σ = 3086157312. Its totient is φ = 803678400.

The previous prime is 1684671809. The next prime is 1684671839. The reversal of 1684671812 is 2181764861.

It is a super-2 number, since 2×1684671812² = 5676238228294726688, which contains 22 as substring.

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, 86873 + ... + 104480.

It is an arithmetic number, because the mean of its divisors is an integer number (128589888).

Almost surely, 2^1684671812 is an apocalyptic number.

It is an amenable number.

1684671812 is a deficient number, since it is larger than the sum of its proper divisors (1401485500).

1684671812 is a wasteful number, since it uses less digits than its factorization.

1684671812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191459 (or 191457 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 1684671812 is about 41044.7537695136. The cubic root of 1684671812 is about 1189.8853106049.

The spelling of 1684671812 in words is "one billion, six hundred eighty-four million, six hundred seventy-one thousand, eight hundred twelve".