289299816 has 128 divisors (see below), whose sum is σ = 870912000. Its totient is φ = 88452864.

The previous prime is 289299763. The next prime is 289299827. The reversal of 289299816 is 618992982.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755161 + ... + 755543.

It is an arithmetic number, because the mean of its divisors is an integer number (6804000).

Almost surely, 2^289299816 is an apocalyptic number.

289299816 is a gapful number since it is divisible by the number (26) 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 289299816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435456000).

289299816 is an abundant number, since it is smaller than the sum of its proper divisors (581612184).

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

289299816 is a wasteful number, since it uses less digits than its factorization.

289299816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 670 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 289299816 is about 17008.8158317973. The cubic root of 289299816 is about 661.3774537621.

The spelling of 289299816 in words is "two hundred eighty-nine million, two hundred ninety-nine thousand, eight hundred sixteen".