290550728 has 32 divisors (see below), whose sum is σ = 589800960. Its totient is φ = 133389120.

The previous prime is 290550721. The next prime is 290550749. The reversal of 290550728 is 827055092.

It is a junction number, because it is equal to n+sod(n) for n = 290550691 and 290550700.

It is not an unprimeable number, because it can be changed into a prime (290550721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12551 + ... + 27177.

It is an arithmetic number, because the mean of its divisors is an integer number (18431280).

Almost surely, 2^290550728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290550728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294900480).

290550728 is an abundant number, since it is smaller than the sum of its proper divisors (299250232).

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

290550728 is a wasteful number, since it uses less digits than its factorization.

290550728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14837 (or 14833 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 290550728 is about 17045.5486271343. The cubic root of 290550728 is about 662.3293329457.

The spelling of 290550728 in words is "two hundred ninety million, five hundred fifty thousand, seven hundred twenty-eight".