345678912 has 84 divisors (see below), whose sum is σ = 996840780. Its totient is φ = 114527232.

The previous prime is 345678911. The next prime is 345678919. The reversal of 345678912 is 219876543.

345678912 is a `hidden beast` number, since 3 + 4 + 567 + 89 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 149230656 + 196448256 = 12216^2 + 14016^2 .

It is not an unprimeable number, because it can be changed into a prime (345678911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97914 + ... + 101382.

Almost surely, 2^345678912 is an apocalyptic number.

345678912 is a gapful number since it is divisible by the number (32) 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 345678912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498420390).

345678912 is an abundant number, since it is smaller than the sum of its proper divisors (651161868).

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

345678912 is a wasteful number, since it uses less digits than its factorization.

345678912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660 (or 3647 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 345678912 is about 18592.4423355298. The cubic root of 345678912 is about 701.8176651637.

The spelling of 345678912 in words is "three hundred forty-five million, six hundred seventy-eight thousand, nine hundred twelve".