289408228940 has 24 divisors (see below), whose sum is σ = 608049138480. Its totient is φ = 115707699648.

The previous prime is 289408228919. The next prime is 289408228957. The reversal of 289408228940 is 49822804982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3431795 + ... + 3515114.

It is an arithmetic number, because the mean of its divisors is an integer number (25335380770).

Almost surely, 2^289408228940 is an apocalyptic number.

289408228940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289408228940 is an abundant number, since it is smaller than the sum of its proper divisors (318640909540).

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

289408228940 is a wasteful number, since it uses less digits than its factorization.

289408228940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6949001 (or 6948999 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 289408228940 in words is "two hundred eighty-nine billion, four hundred eight million, two hundred twenty-eight thousand, nine hundred forty".