1812491284 has 24 divisors (see below), whose sum is σ = 3196863488. Its totient is φ = 899125920.

The previous prime is 1812491281. The next prime is 1812491293. The reversal of 1812491284 is 4821942181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812491281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332509 + ... + 337915.

Almost surely, 2^1812491284 is an apocalyptic number.

It is an amenable number.

1812491284 is a deficient number, since it is larger than the sum of its proper divisors (1384372204).

1812491284 is a wasteful number, since it uses less digits than its factorization.

1812491284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055 (or 6053 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 1812491284 is about 42573.3635504643. The cubic root of 1812491284 is about 1219.2477858779.

The spelling of 1812491284 in words is "one billion, eight hundred twelve million, four hundred ninety-one thousand, two hundred eighty-four".