389280491 has 4 divisors (see below), whose sum is σ = 390159672. Its totient is φ = 388401312.

The previous prime is 389280473. The next prime is 389280499. The reversal of 389280491 is 194082983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194082983 = 73 ⋅2658671.

It is a cyclic number.

It is not a de Polignac number, because 389280491 - 2²² = 385086187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389280499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438926 + ... + 439811.

It is an arithmetic number, because the mean of its divisors is an integer number (97539918).

Almost surely, 2^389280491 is an apocalyptic number.

389280491 is a deficient number, since it is larger than the sum of its proper divisors (879181).

389280491 is an equidigital number, since it uses as much as digits as its factorization.

389280491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879180.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 389280491 is about 19730.1923710845. The cubic root of 389280491 is about 730.1647785905.

The spelling of 389280491 in words is "three hundred eighty-nine million, two hundred eighty thousand, four hundred ninety-one".