678023620 has 12 divisors (see below), whose sum is σ = 1423849644. Its totient is φ = 271209440.

The previous prime is 678023573. The next prime is 678023623. The reversal of 678023620 is 26320876.

It can be written as a sum of positive squares in 2 ways, for example, as 395850816 + 282172804 = 19896^2 + 16798^2 .

It is not an unprimeable number, because it can be changed into a prime (678023623) 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 3 ways as a sum of consecutive naturals, for example, 16950571 + ... + 16950610.

It is an arithmetic number, because the mean of its divisors is an integer number (118654137).

Almost surely, 2^678023620 is an apocalyptic number.

It is an amenable number.

678023620 is an abundant number, since it is smaller than the sum of its proper divisors (745826024).

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

678023620 is a wasteful number, since it uses less digits than its factorization.

678023620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33901190 (or 33901188 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 678023620 is about 26038.8866889504. The cubic root of 678023620 is about 878.5131659364.

The spelling of 678023620 in words is "six hundred seventy-eight million, twenty-three thousand, six hundred twenty".