343507878 has 160 divisors (see below), whose sum is σ = 940896000. Its totient is φ = 91492416.

The previous prime is 343507877. The next prime is 343507891. The reversal of 343507878 is 878705343.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343507873) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2305348 + ... + 2305496.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^343507878 is an apocalyptic number.

343507878 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 343507878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470448000).

343507878 is an abundant number, since it is smaller than the sum of its proper divisors (597388122).

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

343507878 is a wasteful number, since it uses less digits than its factorization.

343507878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 343507878 is about 18533.9655227909. The cubic root of 343507878 is about 700.3453248540.

The spelling of 343507878 in words is "three hundred forty-three million, five hundred seven thousand, eight hundred seventy-eight".