1812464420 has 24 divisors (see below), whose sum is σ = 4098958584. Its totient is φ = 669217536.

The previous prime is 1812464413. The next prime is 1812464453. The reversal of 1812464420 is 244642181.

It can be written as a sum of positive squares in 4 ways, for example, as 156300004 + 1656164416 = 12502^2 + 40696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3485249 + ... + 3485768.

It is an arithmetic number, because the mean of its divisors is an integer number (170789941).

Almost surely, 2^1812464420 is an apocalyptic number.

1812464420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1812464420 is an abundant number, since it is smaller than the sum of its proper divisors (2286494164).

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

1812464420 is a wasteful number, since it uses less digits than its factorization.

1812464420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971039 (or 6971037 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 1812464420 is about 42573.0480468571. The cubic root of 1812464420 is about 1219.2417621185.

The spelling of 1812464420 in words is "one billion, eight hundred twelve million, four hundred sixty-four thousand, four hundred twenty".