290381065 has 16 divisors (see below), whose sum is σ = 384417936. Its totient is φ = 209203200.

The previous prime is 290381053. The next prime is 290381093. The reversal of 290381065 is 560183092.

It can be written as a sum of positive squares in 8 ways, for example, as 44769481 + 245611584 = 6691^2 + 15672^2 .

It is not a de Polignac number, because 290381065 - 2¹¹ = 290379017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 290381065.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51816 + ... + 57145.

It is an arithmetic number, because the mean of its divisors is an integer number (24026121).

Almost surely, 2^290381065 is an apocalyptic number.

It is an amenable number.

290381065 is a deficient number, since it is larger than the sum of its proper divisors (94036871).

290381065 is a wasteful number, since it uses less digits than its factorization.

290381065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109020.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 290381065 is about 17040.5711465314. The cubic root of 290381065 is about 662.2003885529.

It can be divided in two parts, 29038 and 1065, that added together give a palindrome (30103).

The spelling of 290381065 in words is "two hundred ninety million, three hundred eighty-one thousand, sixty-five".