1812684628 has 6 divisors (see below), whose sum is σ = 3172198106. Its totient is φ = 906342312.

The previous prime is 1812684623. The next prime is 1812684637. The reversal of 1812684628 is 8264862181.

It can be written as a sum of positive squares in only one way, i.e., 1809821764 + 2862864 = 42542^2 + 1692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812684623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226585575 + ... + 226585582.

Almost surely, 2^1812684628 is an apocalyptic number.

It is an amenable number.

1812684628 is a deficient number, since it is larger than the sum of its proper divisors (1359513478).

1812684628 is a wasteful number, since it uses less digits than its factorization.

1812684628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453171161 (or 453171159 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The square root of 1812684628 is about 42575.6342054936. The cubic root of 1812684628 is about 1219.2911379691.

The spelling of 1812684628 in words is "one billion, eight hundred twelve million, six hundred eighty-four thousand, six hundred twenty-eight".