289746381 has 8 divisors (see below), whose sum is σ = 386854240. Its totient is φ = 192901392.

The previous prime is 289746377. The next prime is 289746397. The reversal of 289746381 is 183647982.

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

It is not a de Polignac number, because 289746381 - 2² = 289746377 is a prime.

It is a super-2 number, since 2×289746381² = 167905930605194322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 289746381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289746361) 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, 63130 + ... + 67563.

It is an arithmetic number, because the mean of its divisors is an integer number (48356780).

Almost surely, 2^289746381 is an apocalyptic number.

It is an amenable number.

289746381 is a deficient number, since it is larger than the sum of its proper divisors (97107859).

289746381 is a wasteful number, since it uses less digits than its factorization.

289746381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131435.

The product of its digits is 580608, while the sum is 48.

The square root of 289746381 is about 17021.9382268883. The cubic root of 289746381 is about 661.7175809352.

The spelling of 289746381 in words is "two hundred eighty-nine million, seven hundred forty-six thousand, three hundred eighty-one".