1806831312 has 240 divisors, whose sum is σ = 5697427008. Its totient is φ = 486420480.

The previous prime is 1806831307. The next prime is 1806831343. The reversal of 1806831312 is 2131386081.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5772468 + ... + 5772780.

Almost surely, 2^1806831312 is an apocalyptic number.

1806831312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806831312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848713504).

1806831312 is an abundant number, since it is smaller than the sum of its proper divisors (3890595696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1806831312 is a wasteful number, since it uses less digits than its factorization.

1806831312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1806831312 is about 42506.8384145422. The cubic root of 1806831312 is about 1217.9773238409.

The spelling of 1806831312 in words is "one billion, eight hundred six million, eight hundred thirty-one thousand, three hundred twelve".