290285505 has 64 divisors (see below), whose sum is σ = 544320000. Its totient is φ = 146555136.

The previous prime is 290285503. The next prime is 290285509. The reversal of 290285505 is 505582092.

It is not a de Polignac number, because 290285505 - 2¹ = 290285503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 290285505.

It is not an unprimeable number, because it can be changed into a prime (290285503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206796 + ... + 208194.

It is an arithmetic number, because the mean of its divisors is an integer number (8505000).

Almost surely, 2^290285505 is an apocalyptic number.

It is an amenable number.

290285505 is a deficient number, since it is larger than the sum of its proper divisors (254034495).

290285505 is a wasteful number, since it uses less digits than its factorization.

290285505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 290285505 is about 17037.7670191842. The cubic root of 290285505 is about 662.1277405517.

The spelling of 290285505 in words is "two hundred ninety million, two hundred eighty-five thousand, five hundred five".