340487 has 8 divisors (see below), whose sum is σ = 393216. Its totient is φ = 288792.

The previous prime is 340481. The next prime is 340519. The reversal of 340487 is 784043.

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

It is not a de Polignac number, because 340487 - 2¹⁶ = 274951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340487.

It is not an unprimeable number, because it can be changed into a prime (340481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (49152).

2³⁴⁰⁴⁸⁷ is an apocalyptic number.

340487 is a deficient number, since it is larger than the sum of its proper divisors (52729).

340487 is a wasteful number, since it uses less digits than its factorization.

340487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

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

The square root of 340487 is about 583.5126391090. The cubic root of 340487 is about 69.8286284154.

Subtracting 340487 from its reverse (784043), we obtain a square (443556 = 666²).

The spelling of 340487 in words is "three hundred forty thousand, four hundred eighty-seven".