340217856 has 156 divisors (see below), whose sum is σ = 1073348640. Its totient is φ = 102973440.

The previous prime is 340217807. The next prime is 340217861. The reversal of 340217856 is 658712043.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 340217856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405085 + ... + 405923.

It is an arithmetic number, because the mean of its divisors is an integer number (6880440).

Almost surely, 2^340217856 is an apocalyptic number.

340217856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340217856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536674320).

340217856 is an abundant number, since it is smaller than the sum of its proper divisors (733130784).

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

340217856 is a wasteful number, since it uses less digits than its factorization.

340217856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 340217856 is about 18444.9954188121. The cubic root of 340217856 is about 698.1022447190.

Adding to 340217856 its reverse (658712043), we get a palindrome (998929899).

The spelling of 340217856 in words is "three hundred forty million, two hundred seventeen thousand, eight hundred fifty-six".