289228491 has 6 divisors (see below), whose sum is σ = 417774500. Its totient is φ = 192818988.

The previous prime is 289228483. The next prime is 289228501. The reversal of 289228491 is 194822982.

It is a happy number.

289228491 is a `hidden beast` number, since 289 + 2 + 284 + 91 = 666.

It is not a de Polignac number, because 289228491 - 2³ = 289228483 is a prime.

It is a super-2 number, since 2×289228491² = 167306240012274162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289228421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16068241 + ... + 16068258.

Almost surely, 2^289228491 is an apocalyptic number.

289228491 is a deficient number, since it is larger than the sum of its proper divisors (128546009).

289228491 is a wasteful number, since it uses less digits than its factorization.

289228491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32136505 (or 32136502 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 289228491 is about 17006.7189957381. The cubic root of 289228491 is about 661.3230965157.

The spelling of 289228491 in words is "two hundred eighty-nine million, two hundred twenty-eight thousand, four hundred ninety-one".