290087 has 8 divisors (see below), whose sum is σ = 343200. Its totient is φ = 239904.

The previous prime is 290083. The next prime is 290107. The reversal of 290087 is 780092.

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

It is not a de Polignac number, because 290087 - 2² = 290083 is a prime.

It is an Ulam number.

It is a Duffinian number.

290087 is a modest number, since divided by 87 gives 29 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290087.

It is not an unprimeable number, because it can be changed into a prime (290083) 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, 512 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (42900).

2²⁹⁰⁰⁸⁷ is an apocalyptic number.

290087 is a deficient number, since it is larger than the sum of its proper divisors (53113).

290087 is a wasteful number, since it uses less digits than its factorization.

290087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 290087 is about 538.5972521282. The cubic root of 290087 is about 66.1976779244.

The spelling of 290087 in words is "two hundred ninety thousand, eighty-seven".