1098990668 has 6 divisors (see below), whose sum is σ = 1923233676. Its totient is φ = 549495332.

The previous prime is 1098990649. The next prime is 1098990677. The reversal of 1098990668 is 8660998901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137373830 + ... + 137373837.

It is an arithmetic number, because the mean of its divisors is an integer number (320538946).

Almost surely, 2^1098990668 is an apocalyptic number.

It is an amenable number.

1098990668 is a deficient number, since it is larger than the sum of its proper divisors (824243008).

1098990668 is a wasteful number, since it uses less digits than its factorization.

1098990668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274747671 (or 274747669 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 1098990668 is about 33151.0281590179. The cubic root of 1098990668 is about 1031.9642875189.

The spelling of 1098990668 in words is "one billion, ninety-eight million, nine hundred ninety thousand, six hundred sixty-eight".