290940081 has 8 divisors (see below), whose sum is σ = 388435584. Its totient is φ = 193702320.

The previous prime is 290940079. The next prime is 290940101. The reversal of 290940081 is 180049092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 290940081 - 2¹ = 290940079 is a prime.

It is a super-2 number, since 2×290940081² = 169292261464573122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (290940031) 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, 61785 + ... + 66326.

It is an arithmetic number, because the mean of its divisors is an integer number (48554448).

Almost surely, 2^290940081 is an apocalyptic number.

It is an amenable number.

290940081 is a deficient number, since it is larger than the sum of its proper divisors (97495503).

290940081 is a wasteful number, since it uses less digits than its factorization.

290940081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128871.

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

The square root of 290940081 is about 17056.9657618229. The cubic root of 290940081 is about 662.6250527435.

The spelling of 290940081 in words is "two hundred ninety million, nine hundred forty thousand, eighty-one".