289207740 has 96 divisors (see below), whose sum is σ = 902603520. Its totient is φ = 68760576.

The previous prime is 289207717. The next prime is 289207741. The reversal of 289207740 is 47702982.

289207740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×289207740² = 167282233751815200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289207741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11919 + ... + 26841.

It is an arithmetic number, because the mean of its divisors is an integer number (9402120).

Almost surely, 2^289207740 is an apocalyptic number.

289207740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289207740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451301760).

289207740 is an abundant number, since it is smaller than the sum of its proper divisors (613395780).

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

289207740 is a wasteful number, since it uses less digits than its factorization.

289207740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14971 (or 14969 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 289207740 is about 17006.1089023915. The cubic root of 289207740 is about 661.3072803655.

The spelling of 289207740 in words is "two hundred eighty-nine million, two hundred seven thousand, seven hundred forty".