1815480000 has 420 divisors, whose sum is σ = 6835968040. Its totient is φ = 472320000.

The previous prime is 1815479989. The next prime is 1815480047. The reversal of 1815480000 is 845181.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1815480000 is a `hidden beast` number, since 181 + 5 + 480 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 44279980 + ... + 44280020.

Almost surely, 2^1815480000 is an apocalyptic number.

1815480000 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 1815480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3417984020).

1815480000 is an abundant number, since it is smaller than the sum of its proper divisors (5020488040).

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

1815480000 is an frugal number, since it uses more digits than its factorization.

1815480000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1815480000 is about 42608.4498661944. The cubic root of 1815480000 is about 1219.9175793106.

Multiplying 1815480000 by its sum of digits (27), we get a square (49017960000 = 221400²).

1815480000 divided by its sum of digits (27) gives a square (67240000 = 8200²).

The spelling of 1815480000 in words is "one billion, eight hundred fifteen million, four hundred eighty thousand".