290648009 has 8 divisors (see below), whose sum is σ = 293849088. Its totient is φ = 287461440.

The previous prime is 290647999. The next prime is 290648011. The reversal of 290648009 is 900846092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-290648009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290648509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39404 + ... + 46194.

It is an arithmetic number, because the mean of its divisors is an integer number (36731136).

Almost surely, 2^290648009 is an apocalyptic number.

It is an amenable number.

290648009 is a deficient number, since it is larger than the sum of its proper divisors (3201079).

290648009 is a wasteful number, since it uses less digits than its factorization.

290648009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 290648009 is about 17048.4019485698. The cubic root of 290648009 is about 662.4032441587.

It can be divided in two parts, 29064 and 8009, that added together give a palindrome (37073).

The spelling of 290648009 in words is "two hundred ninety million, six hundred forty-eight thousand, nine".