340321861 has 16 divisors (see below), whose sum is σ = 394910208. Its totient is φ = 289843200.

The previous prime is 340321859. The next prime is 340321879. The reversal of 340321861 is 168123043.

It is not a de Polignac number, because 340321861 - 2¹ = 340321859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340321831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37621 + ... + 45781.

It is an arithmetic number, because the mean of its divisors is an integer number (24681888).

Almost surely, 2^340321861 is an apocalyptic number.

It is an amenable number.

340321861 is a deficient number, since it is larger than the sum of its proper divisors (54588347).

340321861 is a wasteful number, since it uses less digits than its factorization.

340321861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8412.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 340321861 is about 18447.8145318084. The cubic root of 340321861 is about 698.1733743647.

The spelling of 340321861 in words is "three hundred forty million, three hundred twenty-one thousand, eight hundred sixty-one".