1812742472 has 12 divisors (see below), whose sum is σ = 3399117945. Its totient is φ = 906311024.

The previous prime is 1812742457. The next prime is 1812742513. The reversal of 1812742472 is 2742472181.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1279779076 + 532963396 = 35774^2 + 23086^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=30106.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 112898 + ... + 127950.

Almost surely, 2^1812742472 is an apocalyptic number.

It is an amenable number.

1812742472 is a deficient number, since it is larger than the sum of its proper divisors (1586375473).

1812742472 is an frugal number, since it uses more digits than its factorization.

1812742472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30112 (or 15055 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 1812742472 is about 42576.3135088044. The cubic root of 1812742472 is about 1219.3041073011.

The spelling of 1812742472 in words is "one billion, eight hundred twelve million, seven hundred forty-two thousand, four hundred seventy-two".