1820007998 has 16 divisors (see below), whose sum is σ = 2891499120. Its totient is φ = 856208256.

The previous prime is 1820007979. The next prime is 1820008019. The reversal of 1820007998 is 8997000281.

It is a super-2 number, since 2×1820007998² = 6624858225567936008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142208 + ... + 154476.

It is an arithmetic number, because the mean of its divisors is an integer number (180718695).

Almost surely, 2^1820007998 is an apocalyptic number.

1820007998 is a deficient number, since it is larger than the sum of its proper divisors (1071491122).

1820007998 is a wasteful number, since it uses less digits than its factorization.

1820007998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16651.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1820007998 is about 42661.5517533059. The cubic root of 1820007998 is about 1220.9309382041.

The spelling of 1820007998 in words is "one billion, eight hundred twenty million, seven thousand, nine hundred ninety-eight".