289261334728380 has 48 divisors (see below), whose sum is σ = 925636271132160. Its totient is φ = 66116876509248.

The previous prime is 289261334728367. The next prime is 289261334728381. The reversal of 289261334728380 is 83827433162982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289261334728381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344358731400 + ... + 344358732239.

It is an arithmetic number, because the mean of its divisors is an integer number (19284088981920).

Almost surely, 2^{289261334728380} is an apocalyptic number.

289261334728380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289261334728380 is an abundant number, since it is smaller than the sum of its proper divisors (636374936403780).

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

289261334728380 is a wasteful number, since it uses less digits than its factorization.

289261334728380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688717463658 (or 688717463656 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 66.

The spelling of 289261334728380 in words is "two hundred eighty-nine trillion, two hundred sixty-one billion, three hundred thirty-four million, seven hundred twenty-eight thousand, three hundred eighty".