290421040 has 240 divisors, whose sum is σ = 872756640. Its totient is φ = 89026560.

The previous prime is 290420987. The next prime is 290421041. The reversal of 290421040 is 40124092.

It is not an unprimeable number, because it can be changed into a prime (290421041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2089291 + ... + 2089429.

It is an arithmetic number, because the mean of its divisors is an integer number (3636486).

Almost surely, 2^290421040 is an apocalyptic number.

290421040 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 290421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436378320).

290421040 is an abundant number, since it is smaller than the sum of its proper divisors (582335600).

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

290421040 is a wasteful number, since it uses less digits than its factorization.

290421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 290421040 is about 17041.7440422041. The cubic root of 290421040 is about 662.2307741957.

The spelling of 290421040 in words is "two hundred ninety million, four hundred twenty-one thousand, forty".