1988258393 has 8 divisors (see below), whose sum is σ = 2180994816. Its totient is φ = 1797519600.

The previous prime is 1988258359. The next prime is 1988258399. The reversal of 1988258393 is 3938528891.

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

It is a cyclic number.

It is not a de Polignac number, because 1988258393 - 2⁶ = 1988258329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1988258399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497321 + ... + 501302.

It is an arithmetic number, because the mean of its divisors is an integer number (272624352).

Almost surely, 2^1988258393 is an apocalyptic number.

It is an amenable number.

1988258393 is a deficient number, since it is larger than the sum of its proper divisors (192736423).

1988258393 is a wasteful number, since it uses less digits than its factorization.

1988258393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998815.

The product of its digits is 3732480, while the sum is 56.

The square root of 1988258393 is about 44589.8911525920. The cubic root of 1988258393 is about 1257.4506261419.

The spelling of 1988258393 in words is "one billion, nine hundred eighty-eight million, two hundred fifty-eight thousand, three hundred ninety-three".