363638989 has 8 divisors (see below), whose sum is σ = 423429120. Its totient is φ = 305809296.

The previous prime is 363638987. The next prime is 363639049. The reversal of 363638989 is 989836363.

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 363638989 - 2¹ = 363638987 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363638981) 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, 489709 + ... + 490450.

It is an arithmetic number, because the mean of its divisors is an integer number (52928640).

Almost surely, 2^363638989 is an apocalyptic number.

It is an amenable number.

363638989 is a deficient number, since it is larger than the sum of its proper divisors (59790131).

363638989 is an equidigital number, since it uses as much as digits as its factorization.

363638989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980219.

The product of its digits is 5038848, while the sum is 55.

The square root of 363638989 is about 19069.3206224029. The cubic root of 363638989 is about 713.7675732365.

The spelling of 363638989 in words is "three hundred sixty-three million, six hundred thirty-eight thousand, nine hundred eighty-nine".