289540740 has 48 divisors (see below), whose sum is σ = 818758080. Its totient is φ = 76444800.

The previous prime is 289540739. The next prime is 289540751. The reversal of 289540740 is 47045982.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17830 + ... + 29949.

It is an arithmetic number, because the mean of its divisors is an integer number (17057460).

Almost surely, 2^289540740 is an apocalyptic number.

289540740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289540740 is an abundant number, since it is smaller than the sum of its proper divisors (529217340).

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

289540740 is a wasteful number, since it uses less digits than its factorization.

289540740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47892 (or 47890 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 289540740 is about 17015.8966851589. The cubic root of 289540740 is about 661.5609974780.

The spelling of 289540740 in words is "two hundred eighty-nine million, five hundred forty thousand, seven hundred forty".