998000658 has 12 divisors (see below), whose sum is σ = 2162334798. Its totient is φ = 332666880.

The previous prime is 998000651. The next prime is 998000683. The reversal of 998000658 is 856000899.

It can be written as a sum of positive squares in only one way, i.e., 988284969 + 9715689 = 31437^2 + 3117^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (998000651) 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, 27722223 + ... + 27722258.

Almost surely, 2^998000658 is an apocalyptic number.

998000658 is an abundant number, since it is smaller than the sum of its proper divisors (1164334140).

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

998000658 is a wasteful number, since it uses less digits than its factorization.

998000658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55444489 (or 55444486 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 998000658 is about 31591.1484121739. The cubic root of 998000658 is about 999.3331080206. Note that the first 3 decimals are identical.

The spelling of 998000658 in words is "nine hundred ninety-eight million, six hundred fifty-eight", and thus it is an aban number.