290509085 has 8 divisors (see below), whose sum is σ = 349422336. Its totient is φ = 231866320.

The previous prime is 290509081. The next prime is 290509099. The reversal of 290509085 is 580905092.

It is a happy number.

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

It is not a de Polignac number, because 290509085 - 2² = 290509081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290509081) 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, 65249 + ... + 69558.

It is an arithmetic number, because the mean of its divisors is an integer number (43677792).

Almost surely, 2^290509085 is an apocalyptic number.

It is an amenable number.

290509085 is a deficient number, since it is larger than the sum of its proper divisors (58913251).

290509085 is a wasteful number, since it uses less digits than its factorization.

290509085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135243.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 290509085 is about 17044.3270621049. The cubic root of 290509085 is about 662.2976887891.

The spelling of 290509085 in words is "two hundred ninety million, five hundred nine thousand, eighty-five".