289278404 has 6 divisors (see below), whose sum is σ = 506237214. Its totient is φ = 144639200.

The previous prime is 289278403. The next prime is 289278413. The reversal of 289278404 is 404872982.

It can be written as a sum of positive squares in only one way, i.e., 170250304 + 119028100 = 13048^2 + 10910^2 .

It is not an unprimeable number, because it can be changed into a prime (289278403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36159797 + ... + 36159804.

It is an arithmetic number, because the mean of its divisors is an integer number (84372869).

Almost surely, 2^289278404 is an apocalyptic number.

It is an amenable number.

289278404 is a deficient number, since it is larger than the sum of its proper divisors (216958810).

289278404 is a wasteful number, since it uses less digits than its factorization.

289278404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72319605 (or 72319603 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 289278404 is about 17008.1863818574. The cubic root of 289278404 is about 661.3611364762.

The spelling of 289278404 in words is "two hundred eighty-nine million, two hundred seventy-eight thousand, four hundred four".