289478242 has 4 divisors (see below), whose sum is σ = 434217366. Its totient is φ = 144739120.

The previous prime is 289478237. The next prime is 289478251. The reversal of 289478242 is 242874982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 234733041 + 54745201 = 15321^2 + 7399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 289478192 and 289478201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72369559 + ... + 72369562.

Almost surely, 2^289478242 is an apocalyptic number.

289478242 is a deficient number, since it is larger than the sum of its proper divisors (144739124).

289478242 is a wasteful number, since it uses less digits than its factorization.

289478242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144739123.

The product of its digits is 516096, while the sum is 46.

The square root of 289478242 is about 17014.0601268480. The cubic root of 289478242 is about 661.5133942582.

The spelling of 289478242 in words is "two hundred eighty-nine million, four hundred seventy-eight thousand, two hundred forty-two".