1998620334 has 48 divisors (see below), whose sum is σ = 4589395200. Its totient is φ = 626426880.

The previous prime is 1998620321. The next prime is 1998620359. The reversal of 1998620334 is 4330268991.

It is a happy number.

1998620334 is a `hidden beast` number, since 19 + 9 + 8 + 620 + 3 + 3 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1998620334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414067 + ... + 418865.

It is an arithmetic number, because the mean of its divisors is an integer number (95612400).

Almost surely, 2^1998620334 is an apocalyptic number.

1998620334 is an abundant number, since it is smaller than the sum of its proper divisors (2590774866).

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

1998620334 is a wasteful number, since it uses less digits than its factorization.

1998620334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185 (or 6182 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1998620334 is about 44705.9317540749. The cubic root of 1998620334 is about 1259.6312715459.

The spelling of 1998620334 in words is "one billion, nine hundred ninety-eight million, six hundred twenty thousand, three hundred thirty-four".