289748520 has 48 divisors (see below), whose sum is σ = 941683860. Its totient is φ = 77266176.

The previous prime is 289748477. The next prime is 289748521. The reversal of 289748520 is 25847982.

289748520 is a `hidden beast` number, since 2 + 89 + 7 + 48 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 289748484 + 36 = 17022^2 + 6^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (289748521) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 402069 + ... + 402788.

Almost surely, 2^289748520 is an apocalyptic number.

289748520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289748520 is an abundant number, since it is smaller than the sum of its proper divisors (651935340).

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

289748520 is a wasteful number, since it uses less digits than its factorization.

289748520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804874 (or 804867 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 289748520 is about 17022.0010574550. The cubic root of 289748520 is about 661.7192092678.

The spelling of 289748520 in words is "two hundred eighty-nine million, seven hundred forty-eight thousand, five hundred twenty".