1818627428 has 12 divisors (see below), whose sum is σ = 3369809772. Its totient is φ = 855824640.

The previous prime is 1818627413. The next prime is 1818627463. The reversal of 1818627428 is 8247268181.

It can be written as a sum of positive squares in 2 ways, for example, as 1590254884 + 228372544 = 39878^2 + 15112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13372193 + ... + 13372328.

It is an arithmetic number, because the mean of its divisors is an integer number (280817481).

Almost surely, 2^1818627428 is an apocalyptic number.

It is an amenable number.

1818627428 is a deficient number, since it is larger than the sum of its proper divisors (1551182344).

1818627428 is a wasteful number, since it uses less digits than its factorization.

1818627428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26744542 (or 26744540 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 1818627428 is about 42645.3681892887. The cubic root of 1818627428 is about 1220.6221470693.

The spelling of 1818627428 in words is "one billion, eight hundred eighteen million, six hundred twenty-seven thousand, four hundred twenty-eight".