1998786376 has 16 divisors (see below), whose sum is σ = 3750498540. Its totient is φ = 998653440.

The previous prime is 1998786371. The next prime is 1998786431. The reversal of 1998786376 is 6736878991.

It can be written as a sum of positive squares in 2 ways, for example, as 1863994276 + 134792100 = 43174^2 + 11610^2 .

It is not an unprimeable number, because it can be changed into a prime (1998786371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80901 + ... + 102676.

Almost surely, 2^1998786376 is an apocalyptic number.

It is an amenable number.

1998786376 is a deficient number, since it is larger than the sum of its proper divisors (1751712164).

1998786376 is a wasteful number, since it uses less digits than its factorization.

1998786376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184944 (or 184940 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 64.

The square root of 1998786376 is about 44707.7887621385. The cubic root of 1998786376 is about 1259.6661532591. Note that the first 3 decimals are identical.

The spelling of 1998786376 in words is "one billion, nine hundred ninety-eight million, seven hundred eighty-six thousand, three hundred seventy-six".