290638 has 8 divisors (see below), whose sum is σ = 451080. Its totient is φ = 140280.

The previous prime is 290627. The next prime is 290657. The reversal of 290638 is 836092.

290638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2448 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (56385).

2²⁹⁰⁶³⁸ is an apocalyptic number.

290638 is a deficient number, since it is larger than the sum of its proper divisors (160442).

290638 is a wasteful number, since it uses less digits than its factorization.

290638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 290638 is about 539.1085233977. The cubic root of 290638 is about 66.2395640379.

The spelling of 290638 in words is "two hundred ninety thousand, six hundred thirty-eight".