289549890 has 160 divisors (see below), whose sum is σ = 897684480. Its totient is φ = 65598336.

The previous prime is 289549817. The next prime is 289549903. The reversal of 289549890 is 98945982.

289549890 is a `hidden beast` number, since 2 + 8 + 9 + 549 + 8 + 90 = 666.

289549890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1264296 + ... + 1264524.

It is an arithmetic number, because the mean of its divisors is an integer number (5610528).

Almost surely, 2^289549890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289549890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448842240).

289549890 is an abundant number, since it is smaller than the sum of its proper divisors (608134590).

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

289549890 is a wasteful number, since it uses less digits than its factorization.

289549890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 289549890 is about 17016.1655492652. The cubic root of 289549890 is about 661.5679662376.

The spelling of 289549890 in words is "two hundred eighty-nine million, five hundred forty-nine thousand, eight hundred ninety".