998772480 has 216 divisors, whose sum is σ = 3481994880. Its totient is φ = 264314880.

The previous prime is 998772461. The next prime is 998772497. The reversal of 998772480 is 84277899.

998772480 is a `hidden beast` number, since 9 + 98 + 7 + 72 + 480 = 666.

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 23 ways as a sum of consecutive naturals, for example, 2084881 + ... + 2085359.

Almost surely, 2^998772480 is an apocalyptic number.

998772480 is a gapful number since it is divisible by the number (90) 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 998772480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740997440).

998772480 is an abundant number, since it is smaller than the sum of its proper divisors (2483222400).

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

998772480 is a wasteful number, since it uses less digits than its factorization.

998772480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 998772480 is about 31603.3618464872. The cubic root of 998772480 is about 999.5906591296.

The spelling of 998772480 in words is "nine hundred ninety-eight million, seven hundred seventy-two thousand, four hundred eighty".