2165628108 has 72 divisors (see below), whose sum is σ = 5917304064. Its totient is φ = 614628000.

The previous prime is 2165628107. The next prime is 2165628109. The reversal of 2165628108 is 8018265612.

It is an interprime number because it is at equal distance from previous prime (2165628107) and next prime (2165628109).

It is not an unprimeable number, because it can be changed into a prime (2165628107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76593 + ... + 100983.

Almost surely, 2^2165628108 is an apocalyptic number.

2165628108 is a gapful number since it is divisible by the number (28) 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 2165628108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2958652032).

2165628108 is an abundant number, since it is smaller than the sum of its proper divisors (3751675956).

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

2165628108 is a wasteful number, since it uses less digits than its factorization.

2165628108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24563 (or 24554 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 2165628108 is about 46536.3095657574. The cubic root of 2165628108 is about 1293.7825617047.

The spelling of 2165628108 in words is "two billion, one hundred sixty-five million, six hundred twenty-eight thousand, one hundred eight".