389497281 has 8 divisors (see below), whose sum is σ = 524372160. Its totient is φ = 257143632.

The previous prime is 389497279. The next prime is 389497301. The reversal of 389497281 is 182794983.

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

It is not a de Polignac number, because 389497281 - 2¹ = 389497279 is a prime.

It is a super-2 number, since 2×389497281² = 303416263812785922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (389497201) 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, 629946 + ... + 630563.

It is an arithmetic number, because the mean of its divisors is an integer number (65546520).

Almost surely, 2^389497281 is an apocalyptic number.

It is an amenable number.

389497281 is a deficient number, since it is larger than the sum of its proper divisors (134874879).

389497281 is a wasteful number, since it uses less digits than its factorization.

389497281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260615.

The product of its digits is 870912, while the sum is 51.

The square root of 389497281 is about 19735.6854707406. The cubic root of 389497281 is about 730.3002961679.

The spelling of 389497281 in words is "three hundred eighty-nine million, four hundred ninety-seven thousand, two hundred eighty-one".