998355456 has 400 divisors, whose sum is σ = 3604560960. Its totient is φ = 268738560.

The previous prime is 998355431. The next prime is 998355487. The reversal of 998355456 is 654553899.

It is a happy number.

998355456 is a `hidden beast` number, since 9 + 9 + 83 + 554 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5515686 + ... + 5515866.

Almost surely, 2^998355456 is an apocalyptic number.

998355456 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998355456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1802280480).

998355456 is an abundant number, since it is smaller than the sum of its proper divisors (2606205504).

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

998355456 is a wasteful number, since it uses less digits than its factorization.

998355456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 212 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 998355456 is about 31596.7633785488. The cubic root of 998355456 is about 999.4515178890.

The spelling of 998355456 in words is "nine hundred ninety-eight million, three hundred fifty-five thousand, four hundred fifty-six".