1618486272 has 440 divisors, whose sum is σ = 5548188800. Its totient is φ = 465813504.

The previous prime is 1618486217. The next prime is 1618486283. The reversal of 1618486272 is 2726848161.

1618486272 is a `hidden beast` number, since 1 + 6 + 18 + 4 + 8 + 627 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20487129 + ... + 20487207.

It is an arithmetic number, because the mean of its divisors is an integer number (12609520).

Almost surely, 2^1618486272 is an apocalyptic number.

1618486272 is a gapful number since it is divisible by the number (12) 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 1618486272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2774094400).

1618486272 is an abundant number, since it is smaller than the sum of its proper divisors (3929702528).

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

1618486272 is a wasteful number, since it uses less digits than its factorization.

1618486272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 116 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1618486272 is about 40230.4147629626. The cubic root of 1618486272 is about 1174.0943731229.

The spelling of 1618486272 in words is "one billion, six hundred eighteen million, four hundred eighty-six thousand, two hundred seventy-two".