988857 has 6 divisors (see below), whose sum is σ = 1428362. Its totient is φ = 659232.

The previous prime is 988849. The next prime is 988859. The reversal of 988857 is 758889.

It can be written as a sum of positive squares in only one way, i.e., 670761 + 318096 = 819^2 + 564^2 .

It is not a de Polignac number, because 988857 - 2³ = 988849 is a prime.

It is a Duffinian number.

988857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (988859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54928 + ... + 54945.

2⁹⁸⁸⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

988857 is a deficient number, since it is larger than the sum of its proper divisors (439505).

988857 is a wasteful number, since it uses less digits than its factorization.

988857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109879 (or 109876 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 988857 is about 994.4128921127. The cubic root of 988857 is about 99.6271784348.

The spelling of 988857 in words is "nine hundred eighty-eight thousand, eight hundred fifty-seven".