1812802680 has 320 divisors, whose sum is σ = 6625301760. Its totient is φ = 441925632.

The previous prime is 1812802657. The next prime is 1812802681. The reversal of 1812802680 is 862082181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812802681) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8129049 + ... + 8129271.

It is an arithmetic number, because the mean of its divisors is an integer number (20704068).

Almost surely, 2^1812802680 is an apocalyptic number.

1812802680 is a gapful number since it is divisible by the number (10) 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 1812802680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312650880).

1812802680 is an abundant number, since it is smaller than the sum of its proper divisors (4812499080).

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

1812802680 is a wasteful number, since it uses less digits than its factorization.

1812802680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1812802680 is about 42577.0205627402. The cubic root of 1812802680 is about 1219.3176063778.

1812802680 divided by its sum of digits (36) gives a triangular number (50355630 = T₁₀₀₃₅).

The spelling of 1812802680 in words is "one billion, eight hundred twelve million, eight hundred two thousand, six hundred eighty".