1998696120 has 128 divisors (see below), whose sum is σ = 6385055040. Its totient is φ = 498769920.

The previous prime is 1998696109. The next prime is 1998696163. The reversal of 1998696120 is 216968991.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366534 + ... + 371946.

Almost surely, 2^1998696120 is an apocalyptic number.

1998696120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998696120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3192527520).

1998696120 is an abundant number, since it is smaller than the sum of its proper divisors (4386358920).

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

1998696120 is a wasteful number, since it uses less digits than its factorization.

1998696120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625 (or 5621 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 1998696120 is about 44706.7793516822. The cubic root of 1998696120 is about 1259.6471927303.

The spelling of 1998696120 in words is "one billion, nine hundred ninety-eight million, six hundred ninety-six thousand, one hundred twenty".