1998814670 has 8 divisors (see below), whose sum is σ = 3597866424. Its totient is φ = 799525864.

The previous prime is 1998814669. The next prime is 1998814681. The reversal of 1998814670 is 764188991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99940724 + ... + 99940743.

It is an arithmetic number, because the mean of its divisors is an integer number (449733303).

Almost surely, 2^1998814670 is an apocalyptic number.

1998814670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998814670 is a deficient number, since it is larger than the sum of its proper divisors (1599051754).

1998814670 is a wasteful number, since it uses less digits than its factorization.

1998814670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199881474.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 1998814670 is about 44708.1051935776. The cubic root of 1998814670 is about 1259.6720970035.

The spelling of 1998814670 in words is "one billion, nine hundred ninety-eight million, eight hundred fourteen thousand, six hundred seventy".