1818318276 has 36 divisors (see below), whose sum is σ = 4683032172. Its totient is φ = 594669504.

The previous prime is 1818318263. The next prime is 1818318277. The reversal of 1818318276 is 6728138181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1357185600 + 461132676 = 36840^2 + 21474^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1818318276² = 6612562705671224352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1818318277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474591 + ... + 478406.

It is an arithmetic number, because the mean of its divisors is an integer number (130084227).

Almost surely, 2^1818318276 is an apocalyptic number.

It is an amenable number.

1818318276 is an abundant number, since it is smaller than the sum of its proper divisors (2864713896).

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

1818318276 is a wasteful number, since it uses less digits than its factorization.

1818318276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953060 (or 953055 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1818318276 is about 42641.7433508528. The cubic root of 1818318276 is about 1220.5529778419.

The spelling of 1818318276 in words is "one billion, eight hundred eighteen million, three hundred eighteen thousand, two hundred seventy-six".