678120426 has 24 divisors (see below), whose sum is σ = 1472425344. Its totient is φ = 225553320.

The previous prime is 678120409. The next prime is 678120439. The reversal of 678120426 is 624021876.

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, 31930 + ... + 48741.

It is an arithmetic number, because the mean of its divisors is an integer number (61351056).

Almost surely, 2^678120426 is an apocalyptic number.

678120426 is an abundant number, since it is smaller than the sum of its proper divisors (794304918).

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

678120426 is a wasteful number, since it uses less digits than its factorization.

678120426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81146 (or 81143 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 678120426 is about 26040.7454962411. The cubic root of 678120426 is about 878.5549743611.

It can be divided in two parts, 678 and 120426, that added together give a square (121104 = 348²).

The spelling of 678120426 in words is "six hundred seventy-eight million, one hundred twenty thousand, four hundred twenty-six".