998773520 has 20 divisors (see below), whose sum is σ = 2322148620. Its totient is φ = 399509376.

The previous prime is 998773483. The next prime is 998773549. The reversal of 998773520 is 25377899.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 602604304 + 396169216 = 24548^2 + 19904^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 6242255 + ... + 6242414.

It is an arithmetic number, because the mean of its divisors is an integer number (116107431).

Almost surely, 2^998773520 is an apocalyptic number.

It is an amenable number.

998773520 is an abundant number, since it is smaller than the sum of its proper divisors (1323375100).

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

998773520 is a wasteful number, since it uses less digits than its factorization.

998773520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484682 (or 12484676 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 998773520 is about 31603.3783004286. The cubic root of 998773520 is about 999.5910060801.

The spelling of 998773520 in words is "nine hundred ninety-eight million, seven hundred seventy-three thousand, five hundred twenty".