289623434348940 has 48 divisors (see below), whose sum is σ = 810947171204352. Its totient is φ = 77232767728576.

The previous prime is 289623434348887. The next prime is 289623434348947. The reversal of 289623434348940 is 49843434326982.

It is not an unprimeable number, because it can be changed into a prime (289623434348947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28934137 + ... + 37635503.

It is an arithmetic number, because the mean of its divisors is an integer number (16894732733424).

Almost surely, 2^{289623434348940} is an apocalyptic number.

289623434348940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289623434348940 is an abundant number, since it is smaller than the sum of its proper divisors (521323736855412).

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

289623434348940 is a wasteful number, since it uses less digits than its factorization.

289623434348940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9256126 (or 9256124 counting only the distinct ones).

The product of its (nonzero) digits is 859963392, while the sum is 69.

The spelling of 289623434348940 in words is "two hundred eighty-nine trillion, six hundred twenty-three billion, four hundred thirty-four million, three hundred forty-eight thousand, nine hundred forty".