1998747050 has 12 divisors (see below), whose sum is σ = 3717669606. Its totient is φ = 799498800.

The previous prime is 1998747029. The next prime is 1998747083. The reversal of 1998747050 is 507478991.

It can be written as a sum of positive squares in 3 ways, for example, as 1733806321 + 264940729 = 41639^2 + 16277^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 39974941 = 1998747050 / (1 + 9 + 9 + 8 + 7 + 4 + 7 + 0 + 5 + 0).

It is a self number, because there is not a number n which added to its sum of digits gives 1998747050.

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 5 ways as a sum of consecutive naturals, for example, 19987421 + ... + 19987520.

Almost surely, 2^1998747050 is an apocalyptic number.

1998747050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998747050 is a deficient number, since it is larger than the sum of its proper divisors (1718922556).

1998747050 is a wasteful number, since it uses less digits than its factorization.

1998747050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39974953 (or 39974948 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 1998747050 is about 44707.3489484671. The cubic root of 1998747050 is about 1259.6578919200.

The spelling of 1998747050 in words is "one billion, nine hundred ninety-eight million, seven hundred forty-seven thousand, fifty".