1819490688 has 448 divisors, whose sum is σ = 6100513920. Its totient is φ = 537477120.

The previous prime is 1819490677. The next prime is 1819490707. The reversal of 1819490688 is 8860949181.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 49175406 + ... + 49175442.

Almost surely, 2^1819490688 is an apocalyptic number.

1819490688 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 1819490688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3050256960).

1819490688 is an abundant number, since it is smaller than the sum of its proper divisors (4281023232).

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

1819490688 is an equidigital number, since it uses as much as digits as its factorization.

1819490688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1819490688 is about 42655.4883690247. The cubic root of 1819490688 is about 1220.8152501349.

The spelling of 1819490688 in words is "one billion, eight hundred nineteen million, four hundred ninety thousand, six hundred eighty-eight".