290471868 has 72 divisors (see below), whose sum is σ = 752169600. Its totient is φ = 94486176.

The previous prime is 290471821. The next prime is 290471873. The reversal of 290471868 is 868174092.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345793 + ... + 346631.

It is an arithmetic number, because the mean of its divisors is an integer number (10446800).

Almost surely, 2^290471868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290471868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376084800).

290471868 is an abundant number, since it is smaller than the sum of its proper divisors (461697732).

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

290471868 is a wasteful number, since it uses less digits than its factorization.

290471868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 290471868 is about 17043.2352562534. The cubic root of 290471868 is about 662.2694053526.

The spelling of 290471868 in words is "two hundred ninety million, four hundred seventy-one thousand, eight hundred sixty-eight".