1983667998 has 32 divisors (see below), whose sum is σ = 4275597312. Its totient is φ = 609919200.

The previous prime is 1983667981. The next prime is 1983667999. The reversal of 1983667998 is 8997663891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983667999) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 109443 + ... + 126273.

It is an arithmetic number, because the mean of its divisors is an integer number (133612416).

Almost surely, 2^1983667998 is an apocalyptic number.

1983667998 is an abundant number, since it is smaller than the sum of its proper divisors (2291929314).

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

1983667998 is a wasteful number, since it uses less digits than its factorization.

1983667998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360.

The product of its digits is 35271936, while the sum is 66.

The square root of 1983667998 is about 44538.3879142476. The cubic root of 1983667998 is about 1256.4821666797.

The spelling of 1983667998 in words is "one billion, nine hundred eighty-three million, six hundred sixty-seven thousand, nine hundred ninety-eight".