289778388 has 12 divisors (see below), whose sum is σ = 676149600. Its totient is φ = 96592792.

The previous prime is 289778387. The next prime is 289778389. The reversal of 289778388 is 883877982.

It is an interprime number because it is at equal distance from previous prime (289778387) and next prime (289778389).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289778381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12074088 + ... + 12074111.

It is an arithmetic number, because the mean of its divisors is an integer number (56345800).

Almost surely, 2^289778388 is an apocalyptic number.

It is an amenable number.

289778388 is an abundant number, since it is smaller than the sum of its proper divisors (386371212).

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

289778388 is a wasteful number, since it uses less digits than its factorization.

289778388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24148206 (or 24148204 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 60.

The square root of 289778388 is about 17022.8783700055. The cubic root of 289778388 is about 661.7419457087.

The spelling of 289778388 in words is "two hundred eighty-nine million, seven hundred seventy-eight thousand, three hundred eighty-eight".