998504505 has 24 divisors (see below), whose sum is σ = 1770994368. Its totient is φ = 520150176.

The previous prime is 998504501. The next prime is 998504527. The reversal of 998504505 is 505405899.

998504505 is a `hidden beast` number, since 9 + 98 + 50 + 4 + 505 = 666.

It is not a de Polignac number, because 998504505 - 2² = 998504501 is a prime.

It is a super-2 number, since 2×998504505² = 1994022493010590050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (998504501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256077 + ... + 259946.

It is an arithmetic number, because the mean of its divisors is an integer number (73791432).

Almost surely, 2^998504505 is an apocalyptic number.

It is an amenable number.

998504505 is a deficient number, since it is larger than the sum of its proper divisors (772489863).

998504505 is a wasteful number, since it uses less digits than its factorization.

998504505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516077 (or 516074 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 998504505 is about 31599.1219023567. The cubic root of 998504505 is about 999.5012529594.

The spelling of 998504505 in words is "nine hundred ninety-eight million, five hundred four thousand, five hundred five".