345678684 has 72 divisors (see below), whose sum is σ = 911498112. Its totient is φ = 101724480.

The previous prime is 345678653. The next prime is 345678689. The reversal of 345678684 is 486876543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345678689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42939 + ... + 50349.

It is an arithmetic number, because the mean of its divisors is an integer number (12659696).

Almost surely, 2^345678684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345678684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455749056).

345678684 is an abundant number, since it is smaller than the sum of its proper divisors (565819428).

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

345678684 is a wasteful number, since it uses less digits than its factorization.

345678684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7467 (or 7452 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 345678684 is about 18592.4362040051. The cubic root of 345678684 is about 701.8175108640.

The spelling of 345678684 in words is "three hundred forty-five million, six hundred seventy-eight thousand, six hundred eighty-four".