1815226800 has 60 divisors (see below), whose sum is σ = 5814780360. Its totient is φ = 484060160.

The previous prime is 1815226781. The next prime is 1815226801. The reversal of 1815226800 is 86225181.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (1815226801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 755145 + ... + 757544.

It is an arithmetic number, because the mean of its divisors is an integer number (96913006).

Almost surely, 2^1815226800 is an apocalyptic number.

1815226800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1815226800 is an abundant number, since it is smaller than the sum of its proper divisors (3999553560).

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

1815226800 is a wasteful number, since it uses less digits than its factorization.

1815226800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512710 (or 1512699 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 1815226800 is about 42605.4785209602. The cubic root of 1815226800 is about 1219.8608638245.

The spelling of 1815226800 in words is "one billion, eight hundred fifteen million, two hundred twenty-six thousand, eight hundred".