998400003 has 8 divisors (see below), whose sum is σ = 1331360016. Its totient is φ = 665520000.

The previous prime is 998399999. The next prime is 998400019. The reversal of 998400003 is 300004899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998400003 - 2² = 998399999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998400103) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21303 + ... + 49503.

It is an arithmetic number, because the mean of its divisors is an integer number (166420002).

Almost surely, 2^998400003 is an apocalyptic number.

998400003 is a deficient number, since it is larger than the sum of its proper divisors (332960013).

998400003 is a wasteful number, since it uses less digits than its factorization.

998400003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40005.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 998400003 is about 31597.4683004826. The cubic root of 998400003 is about 999.4663829702.

The spelling of 998400003 in words is "nine hundred ninety-eight million, four hundred thousand, three".