102861028 has 18 divisors (see below), whose sum is σ = 186434066. Its totient is φ = 49655424.

The previous prime is 102861001. The next prime is 102861061. The reversal of 102861028 is 820168201.

It can be written as a sum of positive squares in 3 ways, for example, as 11505664 + 91355364 = 3392^2 + 9558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102860987 and 102861005.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11925 + ... + 18652.

Almost surely, 2^102861028 is an apocalyptic number.

It is an amenable number.

102861028 is a deficient number, since it is larger than the sum of its proper divisors (83573038).

102861028 is a wasteful number, since it uses less digits than its factorization.

102861028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30639 (or 30608 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 102861028 is about 10142.0425950594. The cubic root of 102861028 is about 468.5438985377.

The spelling of 102861028 in words is "one hundred two million, eight hundred sixty-one thousand, twenty-eight".