1998544070 has 16 divisors (see below), whose sum is σ = 3786715440. Its totient is φ = 757342944.

The previous prime is 1998544061. The next prime is 1998544073. The reversal of 1998544070 is 704458991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998544073) 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 7 ways as a sum of consecutive naturals, for example, 5259137 + ... + 5259516.

It is an arithmetic number, because the mean of its divisors is an integer number (236669715).

Almost surely, 2^1998544070 is an apocalyptic number.

1998544070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998544070 is a deficient number, since it is larger than the sum of its proper divisors (1788171370).

1998544070 is a wasteful number, since it uses less digits than its factorization.

1998544070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518679.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1998544070 is about 44705.0787942489. The cubic root of 1998544070 is about 1259.6152495365.

The spelling of 1998544070 in words is "one billion, nine hundred ninety-eight million, five hundred forty-four thousand, seventy".