290208081 has 16 divisors (see below), whose sum is σ = 402587648. Its totient is φ = 185749200.

The previous prime is 290208067. The next prime is 290208097. The reversal of 290208081 is 180802092.

It is not a de Polignac number, because 290208081 - 2¹⁵ = 290175313 is a prime.

It is a super-2 number, since 2×290208081² = 168441460555405122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290208011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475 + ... + 24096.

It is an arithmetic number, because the mean of its divisors is an integer number (25161728).

Almost surely, 2^290208081 is an apocalyptic number.

It is an amenable number.

290208081 is a deficient number, since it is larger than the sum of its proper divisors (112379567).

290208081 is a wasteful number, since it uses less digits than its factorization.

290208081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24732.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 290208081 is about 17035.4947389267. The cubic root of 290208081 is about 662.0688684693.

The spelling of 290208081 in words is "two hundred ninety million, two hundred eight thousand, eighty-one".