869210028 has 96 divisors (see below), whose sum is σ = 2316939520. Its totient is φ = 285219792.

The previous prime is 869210009. The next prime is 869210131. The reversal of 869210028 is 820012968.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 869209974 and 869210001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585375 + ... + 586857.

Almost surely, 2^869210028 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 869210028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158469760).

869210028 is an abundant number, since it is smaller than the sum of its proper divisors (1447729492).

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

869210028 is a wasteful number, since it uses less digits than its factorization.

869210028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 869210028 is about 29482.3680867057. The cubic root of 869210028 is about 954.3512412595.

The spelling of 869210028 in words is "eight hundred sixty-nine million, two hundred ten thousand, twenty-eight".