290981220 has 24 divisors (see below), whose sum is σ = 814747584. Its totient is φ = 77594976.

The previous prime is 290981213. The next prime is 290981227. The reversal of 290981220 is 22189092.

It is a happy number.

290981220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (290981213) and next prime (290981227).

It is not an unprimeable number, because it can be changed into a prime (290981227) 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, 2424784 + ... + 2424903.

It is an arithmetic number, because the mean of its divisors is an integer number (33947816).

Almost surely, 2^290981220 is an apocalyptic number.

290981220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290981220 is an abundant number, since it is smaller than the sum of its proper divisors (523766364).

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

290981220 is a wasteful number, since it uses less digits than its factorization.

290981220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849699 (or 4849697 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 290981220 is about 17058.1716488022. The cubic root of 290981220 is about 662.6562830541.

The spelling of 290981220 in words is "two hundred ninety million, nine hundred eighty-one thousand, two hundred twenty".