1007998 has 16 divisors (see below), whose sum is σ = 1671840. Its totient is φ = 453376.

The previous prime is 1007977. The next prime is 1008001. The reversal of 1007998 is 8997001.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 138 + ... + 1426.

It is an arithmetic number, because the mean of its divisors is an integer number (104490).

2^1007998 is an apocalyptic number.

1007998 is a deficient number, since it is larger than the sum of its proper divisors (663842).

1007998 is a wasteful number, since it uses less digits than its factorization.

1007998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1007998 is about 1003.9910358166. The cubic root of 1007998 is about 100.2658923858.

The spelling of 1007998 in words is "one million, seven thousand, nine hundred ninety-eight".