289304398690 has 8 divisors (see below), whose sum is σ = 520747917660. Its totient is φ = 115721759472.

The previous prime is 289304398679. The next prime is 289304398699. The reversal of 289304398690 is 96893403982.

It can be written as a sum of positive squares in 2 ways, for example, as 261625089049 + 27679309641 = 511493^2 + 166371^2 .

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

It is a super-2 number, since 2×289304398690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289304398699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14465219925 + ... + 14465219944.

Almost surely, 2^289304398690 is an apocalyptic number.

289304398690 is a deficient number, since it is larger than the sum of its proper divisors (231443518970).

289304398690 is a wasteful number, since it uses less digits than its factorization.

289304398690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28930439876.

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 289304398690 in words is "two hundred eighty-nine billion, three hundred four million, three hundred ninety-eight thousand, six hundred ninety".