289695920 has 20 divisors (see below), whose sum is σ = 673543200. Its totient is φ = 115878336.

The previous prime is 289695919. The next prime is 289695941. The reversal of 289695920 is 29596982.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810520 + ... + 1810679.

It is an arithmetic number, because the mean of its divisors is an integer number (33677160).

Almost surely, 2^289695920 is an apocalyptic number.

289695920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289695920 is an abundant number, since it is smaller than the sum of its proper divisors (383847280).

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

289695920 is a wasteful number, since it uses less digits than its factorization.

289695920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621212 (or 3621206 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 289695920 is about 17020.4559280884. The cubic root of 289695920 is about 661.6791647298.

The spelling of 289695920 in words is "two hundred eighty-nine million, six hundred ninety-five thousand, nine hundred twenty".