1818396000 has 384 divisors, whose sum is σ = 6722352000. Its totient is φ = 477388800.

The previous prime is 1818395983. The next prime is 1818396011. The reversal of 1818396000 is 6938181.

1818396000 is a `hidden beast` number, since 1 + 8 + 18 + 39 + 600 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12203926 + ... + 12204074.

It is an arithmetic number, because the mean of its divisors is an integer number (17506125).

Almost surely, 2^1818396000 is an apocalyptic number.

1818396000 is a gapful number since it is divisible by the number (10) 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 1818396000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3361176000).

1818396000 is an abundant number, since it is smaller than the sum of its proper divisors (4903956000).

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

1818396000 is a wasteful number, since it uses less digits than its factorization.

1818396000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1818396000 is about 42642.6547016013. The cubic root of 1818396000 is about 1220.5703684365.

The spelling of 1818396000 in words is "one billion, eight hundred eighteen million, three hundred ninety-six thousand".