289220545 has 8 divisors (see below), whose sum is σ = 358260480. Its totient is φ = 223912560.

The previous prime is 289220539. The next prime is 289220557. The reversal of 289220545 is 545022982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289220545 - 2²¹ = 287123393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932815 + ... + 933124.

It is an arithmetic number, because the mean of its divisors is an integer number (44782560).

Almost surely, 2^289220545 is an apocalyptic number.

It is an amenable number.

289220545 is a deficient number, since it is larger than the sum of its proper divisors (69039935).

289220545 is a wasteful number, since it uses less digits than its factorization.

289220545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865975.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 289220545 is about 17006.4853805835. The cubic root of 289220545 is about 661.3170402642.

The spelling of 289220545 in words is "two hundred eighty-nine million, two hundred twenty thousand, five hundred forty-five".