290340 has 36 divisors (see below), whose sum is σ = 881244. Its totient is φ = 77376.

The previous prime is 290327. The next prime is 290347. The reversal of 290340 is 43092.

290340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 147456 = 378^2 + 384^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (290347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (24479).

2²⁹⁰³⁴⁰ is an apocalyptic number.

290340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290340 is an abundant number, since it is smaller than the sum of its proper divisors (590904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

290340 is a wasteful number, since it uses less digits than its factorization.

290340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 290340 is about 538.8320703150. The cubic root of 290340 is about 66.2169171480.

It can be divided in two parts, 290 and 340, that added together give a triangular number (630 = T₃₅).

The spelling of 290340 in words is "two hundred ninety thousand, three hundred forty".