289122978 has 16 divisors (see below), whose sum is σ = 612260640. Its totient is φ = 90705216.

The previous prime is 289122941. The next prime is 289122979. The reversal of 289122978 is 879221982.

It is not an unprimeable number, because it can be changed into a prime (289122979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417168 + ... + 1417371.

It is an arithmetic number, because the mean of its divisors is an integer number (38266290).

Almost surely, 2^289122978 is an apocalyptic number.

289122978 is an abundant number, since it is smaller than the sum of its proper divisors (323137662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289122978 is a wasteful number, since it uses less digits than its factorization.

289122978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834561.

The product of its digits is 290304, while the sum is 48.

The square root of 289122978 is about 17003.6166152969. The cubic root of 289122978 is about 661.2426679814.

The spelling of 289122978 in words is "two hundred eighty-nine million, one hundred twenty-two thousand, nine hundred seventy-eight".