998355 has 32 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 483840.

The previous prime is 998353. The next prime is 998377. The reversal of 998355 is 553899.

It is not a de Polignac number, because 998355 - 2¹ = 998353 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (998353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8779 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁹⁹⁸³⁵⁵ is an apocalyptic number.

998355 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

998355 is a deficient number, since it is larger than the sum of its proper divisors (752685).

998355 is a wasteful number, since it uses less digits than its factorization.

998355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171.

The product of its digits is 48600, while the sum is 39.

The square root of 998355 is about 999.1771614684. The cubic root of 998355 is about 99.9451365722.

The spelling of 998355 in words is "nine hundred ninety-eight thousand, three hundred fifty-five".