289644940 has 24 divisors (see below), whose sum is σ = 655043760. Its totient is φ = 106945728.

The previous prime is 289644931. The next prime is 289644959. The reversal of 289644940 is 49446982.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556750 + ... + 557269.

It is an arithmetic number, because the mean of its divisors is an integer number (27293490).

Almost surely, 2^289644940 is an apocalyptic number.

289644940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289644940 is an abundant number, since it is smaller than the sum of its proper divisors (365398820).

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

289644940 is a wasteful number, since it uses less digits than its factorization.

289644940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114041 (or 1114039 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 289644940 is about 17018.9582524901. The cubic root of 289644940 is about 661.6403488768.

The spelling of 289644940 in words is "two hundred eighty-nine million, six hundred forty-four thousand, nine hundred forty".