998834785 has 24 divisors (see below), whose sum is σ = 1306334520. Its totient is φ = 732805632.

The previous prime is 998834729. The next prime is 998834789. The reversal of 998834785 is 587438899.

It can be written as a sum of positive squares in 12 ways, for example, as 749226384 + 249608401 = 27372^2 + 15799^2 .

It is not a de Polignac number, because 998834785 - 2¹⁹ = 998310497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998834789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128901 + ... + 136429.

It is an arithmetic number, because the mean of its divisors is an integer number (54430605).

Almost surely, 2^998834785 is an apocalyptic number.

It is an amenable number.

998834785 is a deficient number, since it is larger than the sum of its proper divisors (307499735).

998834785 is a wasteful number, since it uses less digits than its factorization.

998834785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717 (or 7704 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The square root of 998834785 is about 31604.3475648525. The cubic root of 998834785 is about 999.6114440438.

The spelling of 998834785 in words is "nine hundred ninety-eight million, eight hundred thirty-four thousand, seven hundred eighty-five".