290284981 has 8 divisors (see below), whose sum is σ = 335482560. Its totient is φ = 246019488.

The previous prime is 290284927. The next prime is 290284987. The reversal of 290284981 is 189482092.

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

It is a cyclic number.

It is not a de Polignac number, because 290284981 - 2⁷ = 290284853 is a prime.

It is a super-2 number, since 2×290284981² = 168530740388340722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290284987) 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, 232351 + ... + 233596.

It is an arithmetic number, because the mean of its divisors is an integer number (41935320).

Almost surely, 2^290284981 is an apocalyptic number.

It is an amenable number.

290284981 is a deficient number, since it is larger than the sum of its proper divisors (45197579).

290284981 is an equidigital number, since it uses as much as digits as its factorization.

290284981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466043.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 290284981 is about 17037.7516415752. The cubic root of 290284981 is about 662.1273421450.

The spelling of 290284981 in words is "two hundred ninety million, two hundred eighty-four thousand, nine hundred eighty-one".