290138 has 4 divisors (see below), whose sum is σ = 435210. Its totient is φ = 145068.

The previous prime is 290137. The next prime is 290141. The reversal of 290138 is 831092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 243049 + 47089 = 493^2 + 217^2 .

It is not an unprimeable number, because it can be changed into a prime (290137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72533 + ... + 72536.

2²⁹⁰¹³⁸ is an apocalyptic number.

290138 is a deficient number, since it is larger than the sum of its proper divisors (145072).

290138 is a wasteful number, since it uses less digits than its factorization.

290138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145071.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 290138 is about 538.6445952574. The cubic root of 290138 is about 66.2015570868.

The spelling of 290138 in words is "two hundred ninety thousand, one hundred thirty-eight".