289970128 has 40 divisors (see below), whose sum is σ = 649833408. Its totient is φ = 122771712.

The previous prime is 289970123. The next prime is 289970129. The reversal of 289970128 is 821079982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289970123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6301 + ... + 24892.

Almost surely, 2^289970128 is an apocalyptic number.

289970128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289970128 is an abundant number, since it is smaller than the sum of its proper divisors (359863280).

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

289970128 is a wasteful number, since it uses less digits than its factorization.

289970128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31291 (or 31285 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 289970128 is about 17028.5092712193. The cubic root of 289970128 is about 661.8878669035.

The spelling of 289970128 in words is "two hundred eighty-nine million, nine hundred seventy thousand, one hundred twenty-eight".