290505066 has 32 divisors (see below), whose sum is σ = 586510848. Its totient is φ = 95923440.

The previous prime is 290505043. The next prime is 290505067. The reversal of 290505066 is 660505092.

It is not an unprimeable number, because it can be changed into a prime (290505067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357801 + ... + 358611.

It is an arithmetic number, because the mean of its divisors is an integer number (18328464).

Almost surely, 2^290505066 is an apocalyptic number.

290505066 is an abundant number, since it is smaller than the sum of its proper divisors (296005782).

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

290505066 is a wasteful number, since it uses less digits than its factorization.

290505066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 290505066 is about 17044.2091632320. The cubic root of 290505066 is about 662.2946346256.

The spelling of 290505066 in words is "two hundred ninety million, five hundred five thousand, sixty-six".