1817428608 has 96 divisors (see below), whose sum is σ = 5410278900. Its totient is φ = 584908800.

The previous prime is 1817428597. The next prime is 1817428633. The reversal of 1817428608 is 8068247181.

1817428608 is a `hidden beast` number, since 1 + 8 + 17 + 4 + 28 + 608 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1790305344 + 27123264 = 42312^2 + 5208^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6208 + ... + 60608.

Almost surely, 2^1817428608 is an apocalyptic number.

1817428608 is a gapful number since it is divisible by the number (18) 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 1817428608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2705139450).

1817428608 is an abundant number, since it is smaller than the sum of its proper divisors (3592850292).

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

1817428608 is a wasteful number, since it uses less digits than its factorization.

1817428608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54450 (or 54435 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 1817428608 is about 42631.3101839481. The cubic root of 1817428608 is about 1220.3538810372.

It can be divided in two parts, 18 and 17428608, that multiplied together give a square (313714944 = 17712²).

The spelling of 1817428608 in words is "one billion, eight hundred seventeen million, four hundred twenty-eight thousand, six hundred eight".