240690 has 32 divisors (see below), whose sum is σ = 590976. Its totient is φ = 62720.

The previous prime is 240677. The next prime is 240701. The reversal of 240690 is 96042.

240690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×240690² = 115863352200, which contains 22 as substring.

It is an unprimeable number.

240690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2074 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (18468).

2²⁴⁰⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295488).

240690 is an abundant number, since it is smaller than the sum of its proper divisors (350286).

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

240690 is a wasteful number, since it uses less digits than its factorization.

240690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 240690 is about 490.6016714199. The cubic root of 240690 is about 62.2041484259.

It can be divided in two parts, 240 and 690, that multiplied together give a triangular number (165600 = T₅₇₅).

The spelling of 240690 in words is "two hundred forty thousand, six hundred ninety".