998478432 has 72 divisors (see below), whose sum is σ = 3245061456. Its totient is φ = 285278976.

The previous prime is 998478427. The next prime is 998478433. The reversal of 998478432 is 234874899.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998478433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245623 + ... + 249654.

It is an arithmetic number, because the mean of its divisors is an integer number (45070298).

Almost surely, 2^998478432 is an apocalyptic number.

It is an amenable number.

998478432 is an abundant number, since it is smaller than the sum of its proper divisors (2246583024).

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

998478432 is a wasteful number, since it uses less digits than its factorization.

998478432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495300 (or 495289 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 998478432 is about 31598.7093407310. The cubic root of 998478432 is about 999.4925532080.

The spelling of 998478432 in words is "nine hundred ninety-eight million, four hundred seventy-eight thousand, four hundred thirty-two".