385280989 has 8 divisors (see below), whose sum is σ = 406959872. Its totient is φ = 364180320.

The previous prime is 385280947. The next prime is 385281007. The reversal of 385280989 is 989082583.

It is a happy number.

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 385280989 - 2⁹ = 385280477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385280939) 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, 143184 + ... + 145849.

It is an arithmetic number, because the mean of its divisors is an integer number (50869984).

Almost surely, 2^385280989 is an apocalyptic number.

It is an amenable number.

385280989 is a deficient number, since it is larger than the sum of its proper divisors (21678883).

385280989 is a wasteful number, since it uses less digits than its factorization.

385280989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289107.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The square root of 385280989 is about 19628.5758270945. The cubic root of 385280989 is about 727.6555732207.

The spelling of 385280989 in words is "three hundred eighty-five million, two hundred eighty thousand, nine hundred eighty-nine".