289780428 has 24 divisors (see below), whose sum is σ = 772748032. Its totient is φ = 82794384.

The previous prime is 289780423. The next prime is 289780459. The reversal of 289780428 is 824087982.

It is not an unprimeable number, because it can be changed into a prime (289780423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724800 + ... + 1724967.

Almost surely, 2^289780428 is an apocalyptic number.

289780428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289780428 is an abundant number, since it is smaller than the sum of its proper divisors (482967604).

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

289780428 is a wasteful number, since it uses less digits than its factorization.

289780428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449781 (or 3449779 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 289780428 is about 17022.9382892613. The cubic root of 289780428 is about 661.7434985624.

The spelling of 289780428 in words is "two hundred eighty-nine million, seven hundred eighty thousand, four hundred twenty-eight".