1812885456 has 80 divisors (see below), whose sum is σ = 5088880640. Its totient is φ = 554014080.

The previous prime is 1812885433. The next prime is 1812885467. The reversal of 1812885456 is 6545882181.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3790 + ... + 60333.

It is an arithmetic number, because the mean of its divisors is an integer number (63611008).

Almost surely, 2^1812885456 is an apocalyptic number.

1812885456 is a gapful number since it is divisible by the number (16) 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 1812885456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544440320).

1812885456 is an abundant number, since it is smaller than the sum of its proper divisors (3275995184).

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

1812885456 is a wasteful number, since it uses less digits than its factorization.

1812885456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64184 (or 64178 counting only the distinct ones).

The product of its digits is 614400, while the sum is 48.

The square root of 1812885456 is about 42577.9926252988. The cubic root of 1812885456 is about 1219.3361648783.

The spelling of 1812885456 in words is "one billion, eight hundred twelve million, eight hundred eighty-five thousand, four hundred fifty-six".