1990335398 has 8 divisors (see below), whose sum is σ = 2989545240. Its totient is φ = 993820320.

The previous prime is 1990335371. The next prime is 1990335407. The reversal of 1990335398 is 8935330991.

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

It is a super-2 number, since 2×1990335398² = 7922869993063636808, which contains 22 as substring.

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, 671843 + ... + 674798.

It is an arithmetic number, because the mean of its divisors is an integer number (373693155).

Almost surely, 2^1990335398 is an apocalyptic number.

1990335398 is a deficient number, since it is larger than the sum of its proper divisors (999209842).

1990335398 is a wasteful number, since it uses less digits than its factorization.

1990335398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347382.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 1990335398 is about 44613.1751616044. The cubic root of 1990335398 is about 1257.8883328871. Note that the first 3 decimals are identical.

The spelling of 1990335398 in words is "one billion, nine hundred ninety million, three hundred thirty-five thousand, three hundred ninety-eight".