340240487 has 4 divisors (see below), whose sum is σ = 340277520. Its totient is φ = 340203456.

The previous prime is 340240471. The next prime is 340240519. The reversal of 340240487 is 784042043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 784042043 = 2351 ⋅333493.

It is a cyclic number.

It is not a de Polignac number, because 340240487 - 2⁴ = 340240471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340240387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6839 + ... + 26967.

It is an arithmetic number, because the mean of its divisors is an integer number (85069380).

Almost surely, 2^340240487 is an apocalyptic number.

340240487 is a deficient number, since it is larger than the sum of its proper divisors (37033).

340240487 is a wasteful number, since it uses less digits than its factorization.

340240487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37032.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 340240487 is about 18445.6088812487. The cubic root of 340240487 is about 698.1177234300.

The spelling of 340240487 in words is "three hundred forty million, two hundred forty thousand, four hundred eighty-seven".