1618120128 has 56 divisors (see below), whose sum is σ = 4312147840. Its totient is φ = 535484160.

The previous prime is 1618120121. The next prime is 1618120159. The reversal of 1618120128 is 8210218161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1618120095 and 1618120104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618120121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628 + ... + 57003.

It is an arithmetic number, because the mean of its divisors is an integer number (77002640).

Almost surely, 2^1618120128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618120128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2156073920).

1618120128 is an abundant number, since it is smaller than the sum of its proper divisors (2694027712).

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

1618120128 is a wasteful number, since it uses less digits than its factorization.

1618120128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60785 (or 60775 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 1618120128 is about 40225.8639186283. The cubic root of 1618120128 is about 1174.0058294759.

Adding to 1618120128 its reverse (8210218161), we get a palindrome (9828338289).

The spelling of 1618120128 in words is "one billion, six hundred eighteen million, one hundred twenty thousand, one hundred twenty-eight".