289401655 has 4 divisors (see below), whose sum is σ = 347281992. Its totient is φ = 231521320.

The previous prime is 289401641. The next prime is 289401691. The reversal of 289401655 is 556104982.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-289401655 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 28940161 + ... + 28940170.

It is an arithmetic number, because the mean of its divisors is an integer number (86820498).

Almost surely, 2^289401655 is an apocalyptic number.

289401655 is a deficient number, since it is larger than the sum of its proper divisors (57880337).

289401655 is an equidigital number, since it uses as much as digits as its factorization.

289401655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57880336.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 289401655 is about 17011.8092806145. The cubic root of 289401655 is about 661.4550504433.

The spelling of 289401655 in words is "two hundred eighty-nine million, four hundred one thousand, six hundred fifty-five".