289138456 has 16 divisors (see below), whose sum is σ = 545383440. Its totient is φ = 143702880.

The previous prime is 289138441. The next prime is 289138469. The reversal of 289138456 is 654831982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106875 + ... + 109546.

It is an arithmetic number, because the mean of its divisors is an integer number (34086465).

Almost surely, 2^289138456 is an apocalyptic number.

It is an amenable number.

289138456 is a deficient number, since it is larger than the sum of its proper divisors (256244984).

289138456 is a wasteful number, since it uses less digits than its factorization.

289138456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216594 (or 216590 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 289138456 is about 17004.0717476727. The cubic root of 289138456 is about 661.2544674948.

The spelling of 289138456 in words is "two hundred eighty-nine million, one hundred thirty-eight thousand, four hundred fifty-six".