985428305 has 4 divisors (see below), whose sum is σ = 1182513972. Its totient is φ = 788342640.

The previous prime is 985428271. The next prime is 985428329. The reversal of 985428305 is 503824589.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129982801 + 855445504 = 11401^2 + 29248^2 .

It is not a de Polignac number, because 985428305 - 2⁸ = 985428049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98542826 + ... + 98542835.

It is an arithmetic number, because the mean of its divisors is an integer number (295628493).

Almost surely, 2^985428305 is an apocalyptic number.

It is an amenable number.

985428305 is a deficient number, since it is larger than the sum of its proper divisors (197085667).

985428305 is a wasteful number, since it uses less digits than its factorization.

985428305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197085666.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 985428305 is about 31391.5323773785. The cubic root of 985428305 is about 995.1189827664.

The spelling of 985428305 in words is "nine hundred eighty-five million, four hundred twenty-eight thousand, three hundred five".