290666240 has 72 divisors (see below), whose sum is σ = 712562928. Its totient is φ = 113541120.

The previous prime is 290666239. The next prime is 290666263. The reversal of 290666240 is 42666092.

It is a self number, because there is not a number n which added to its sum of digits gives 290666240.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52400 + ... + 57680.

Almost surely, 2^290666240 is an apocalyptic number.

290666240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290666240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356281464).

290666240 is an abundant number, since it is smaller than the sum of its proper divisors (421896688).

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

290666240 is an equidigital number, since it uses as much as digits as its factorization.

290666240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345 (or 5331 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 290666240 is about 17048.9366237311. The cubic root of 290666240 is about 662.4170936957.

The spelling of 290666240 in words is "two hundred ninety million, six hundred sixty-six thousand, two hundred forty".