340784 has 30 divisors (see below), whose sum is σ = 708660. Its totient is φ = 158688.

The previous prime is 340777. The next prime is 340787. The reversal of 340784 is 487043.

It is a super-2 number, since 2×340784² = 232267469312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (340787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5747 + ... + 5805.

It is an arithmetic number, because the mean of its divisors is an integer number (23622).

2³⁴⁰⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354330).

340784 is an abundant number, since it is smaller than the sum of its proper divisors (367876).

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

340784 is a wasteful number, since it uses less digits than its factorization.

340784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 340784 is about 583.7670768380. The cubic root of 340784 is about 69.8489258868.

The spelling of 340784 in words is "three hundred forty thousand, seven hundred eighty-four".