289986972 has 24 divisors (see below), whose sum is σ = 738148992. Its totient is φ = 87874800.

The previous prime is 289986953. The next prime is 289987001. The reversal of 289986972 is 279689982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 1098304 + ... + 1098567.

It is an arithmetic number, because the mean of its divisors is an integer number (30756208).

Almost surely, 2^289986972 is an apocalyptic number.

289986972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

289986972 is an abundant number, since it is smaller than the sum of its proper divisors (448162020).

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

289986972 is a wasteful number, since it uses less digits than its factorization.

289986972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196889 (or 2196887 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 60.

The square root of 289986972 is about 17029.0038463793. The cubic root of 289986972 is about 661.9006827332.

The spelling of 289986972 in words is "two hundred eighty-nine million, nine hundred eighty-six thousand, nine hundred seventy-two".