870028898 has 6 divisors (see below), whose sum is σ = 1305105921. Its totient is φ = 434993592.

The previous prime is 870028871. The next prime is 870028903. The reversal of 870028898 is 898820078.

It can be written as a sum of positive squares in 2 ways, for example, as 565631089 + 304397809 = 23783^2 + 17447^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20857.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31286 + ... + 52142.

Almost surely, 2^870028898 is an apocalyptic number.

870028898 is a deficient number, since it is larger than the sum of its proper divisors (435077023).

870028898 is an frugal number, since it uses more digits than its factorization.

870028898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41716 (or 20859 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 870028898 is about 29496.2522704156. The cubic root of 870028898 is about 954.6508406253.

Multiplying 870028898 by its sum of digits (50), we get a square (43501444900 = 208570²).

The spelling of 870028898 in words is "eight hundred seventy million, twenty-eight thousand, eight hundred ninety-eight".