290049660 has 144 divisors (see below), whose sum is σ = 937643616. Its totient is φ = 75209472.

The previous prime is 290049647. The next prime is 290049689. The reversal of 290049660 is 66940092.

It is a super-2 number, since 2×290049660² = 168257610532231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179014 + ... + 180626.

It is an arithmetic number, because the mean of its divisors is an integer number (6511414).

Almost surely, 2^290049660 is an apocalyptic number.

290049660 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 290049660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468821808).

290049660 is an abundant number, since it is smaller than the sum of its proper divisors (647593956).

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

290049660 is a wasteful number, since it uses less digits than its factorization.

290049660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 290049660 is about 17030.8443713164. The cubic root of 290049660 is about 661.9483748073.

The spelling of 290049660 in words is "two hundred ninety million, forty-nine thousand, six hundred sixty".