678111434 has 32 divisors (see below), whose sum is σ = 1365710976. Its totient is φ = 243875520.

The previous prime is 678111433. The next prime is 678111439. The reversal of 678111434 is 434111876.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 678111394 and 678111403.

It is not an unprimeable number, because it can be changed into a prime (678111433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167357 + ... + 171360.

It is an arithmetic number, because the mean of its divisors is an integer number (42678468).

Almost surely, 2^678111434 is an apocalyptic number.

678111434 is an abundant number, since it is smaller than the sum of its proper divisors (687599542).

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

678111434 is a wasteful number, since it uses less digits than its factorization.

678111434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338750.

The product of its digits is 16128, while the sum is 35.

The square root of 678111434 is about 26040.5728431615. The cubic root of 678111434 is about 878.5510910778.

The spelling of 678111434 in words is "six hundred seventy-eight million, one hundred eleven thousand, four hundred thirty-four".