1818270720 has 352 divisors, whose sum is σ = 7388851200. Its totient is φ = 415383552.

The previous prime is 1818270679. The next prime is 1818270731. The reversal of 1818270720 is 270728181.

It is a happy number.

It is a super-2 number, since 2×1818270720² = 6612216822418636800, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 966741 + ... + 968619.

Almost surely, 2^1818270720 is an apocalyptic number.

1818270720 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 1818270720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3694425600).

1818270720 is an abundant number, since it is smaller than the sum of its proper divisors (5570580480).

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

1818270720 is a wasteful number, since it uses less digits than its factorization.

1818270720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1896 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 1818270720 is about 42641.1857246020. The cubic root of 1818270720 is about 1220.5423370345.

The spelling of 1818270720 in words is "one billion, eight hundred eighteen million, two hundred seventy thousand, seven hundred twenty".