289401788 has 24 divisors (see below), whose sum is σ = 564221280. Its totient is φ = 128963520.

The previous prime is 289401779. The next prime is 289401797. The reversal of 289401788 is 887104982.

289401788 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (289401779) and next prime (289401797).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94448 + ... + 97463.

It is an arithmetic number, because the mean of its divisors is an integer number (23509220).

Almost surely, 2^289401788 is an apocalyptic number.

It is an amenable number.

289401788 is a deficient number, since it is larger than the sum of its proper divisors (274819492).

289401788 is a wasteful number, since it uses less digits than its factorization.

289401788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191957 (or 191955 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 289401788 is about 17011.8131896632. The cubic root of 289401788 is about 661.4551517713.

The spelling of 289401788 in words is "two hundred eighty-nine million, four hundred one thousand, seven hundred eighty-eight".