1812886560 has 144 divisors (see below), whose sum is σ = 6197831640. Its totient is φ = 482549760.

The previous prime is 1812886499. The next prime is 1812886561. The reversal of 1812886560 is 656882181.

1812886560 is a `hidden beast` number, since 1 + 8 + 1 + 2 + 8 + 86 + 560 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 697593744 + 1115292816 = 26412^2 + 33396^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1812886561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1267926 + ... + 1269354.

Almost surely, 2^1812886560 is an apocalyptic number.

1812886560 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 1812886560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3098915820).

1812886560 is an abundant number, since it is smaller than the sum of its proper divisors (4384945080).

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

1812886560 is a wasteful number, since it uses less digits than its factorization.

1812886560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 1812886560 is about 42578.0055897408. The cubic root of 1812886560 is about 1219.3364123929.

The spelling of 1812886560 in words is "one billion, eight hundred twelve million, eight hundred eighty-six thousand, five hundred sixty".