290889 has 6 divisors (see below), whose sum is σ = 420186. Its totient is φ = 193920.

The previous prime is 290879. The next prime is 290897. The reversal of 290889 is 988092.

It can be written as a sum of positive squares in only one way, i.e., 233289 + 57600 = 483^2 + 240^2 .

It is not a de Polignac number, because 290889 - 2⁷ = 290761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (290839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16152 + ... + 16169.

It is an arithmetic number, because the mean of its divisors is an integer number (70031).

2²⁹⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

290889 is a deficient number, since it is larger than the sum of its proper divisors (129297).

290889 is a wasteful number, since it uses less digits than its factorization.

290889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32327 (or 32324 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 290889 is about 539.3412648778. The cubic root of 290889 is about 66.2586270953.

The spelling of 290889 in words is "two hundred ninety thousand, eight hundred eighty-nine".