2015561028 has 48 divisors (see below), whose sum is σ = 5068810880. Its totient is φ = 619674624.

The previous prime is 2015561027. The next prime is 2015561029. The reversal of 2015561028 is 8201655102.

It is an interprime number because it is at equal distance from previous prime (2015561027) and next prime (2015561029).

It is a junction number, because it is equal to n+sod(n) for n = 2015560986 and 2015561004.

It is not an unprimeable number, because it can be changed into a prime (2015561027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221268 + ... + 230196.

Almost surely, 2^2015561028 is an apocalyptic number.

It is an amenable number.

2015561028 is an abundant number, since it is smaller than the sum of its proper divisors (3053249852).

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

2015561028 is a wasteful number, since it uses less digits than its factorization.

2015561028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10396 (or 10394 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 2015561028 is about 44895.0000334113. Note that the first 4 decimals coincide. The cubic root of 2015561028 is about 1263.1802228952.

The spelling of 2015561028 in words is "two billion, fifteen million, five hundred sixty-one thousand, twenty-eight".