290887 has 8 divisors (see below), whose sum is σ = 313632. Its totient is φ = 268800.

The previous prime is 290879. The next prime is 290897. The reversal of 290887 is 788092.

It is a happy number.

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 290887 - 2³ = 290879 is a prime.

It is a Duffinian number.

290887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290827) 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, 1087 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (39204).

2²⁹⁰⁸⁸⁷ is an apocalyptic number.

290887 is a deficient number, since it is larger than the sum of its proper divisors (22745).

290887 is a wasteful number, since it uses less digits than its factorization.

290887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 290887 is about 539.3394107610. The cubic root of 290887 is about 66.2584752418.

The spelling of 290887 in words is "two hundred ninety thousand, eight hundred eighty-seven".