1812174772 has 24 divisors (see below), whose sum is σ = 3361413384. Its totient is φ = 851884032.

The previous prime is 1812174769. The next prime is 1812174787. The reversal of 1812174772 is 2774712181.

It can be written as a sum of positive squares in 4 ways, for example, as 663371536 + 1148803236 = 25756^2 + 33894^2 .

It is a congruent number.

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, 52798 + ... + 80074.

It is an arithmetic number, because the mean of its divisors is an integer number (140058891).

Almost surely, 2^1812174772 is an apocalyptic number.

It is an amenable number.

1812174772 is a deficient number, since it is larger than the sum of its proper divisors (1549238612).

1812174772 is a wasteful number, since it uses less digits than its factorization.

1812174772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28275 (or 28273 counting only the distinct ones).

The product of its digits is 43904, while the sum is 40.

The square root of 1812174772 is about 42569.6461343056. The cubic root of 1812174772 is about 1219.1768100845.

The spelling of 1812174772 in words is "one billion, eight hundred twelve million, one hundred seventy-four thousand, seven hundred seventy-two".