678508320 has 96 divisors (see below), whose sum is σ = 2442642048. Its totient is φ = 155086848.

The previous prime is 678508247. The next prime is 678508339. The reversal of 678508320 is 23805876.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97609 + ... + 104328.

It is an arithmetic number, because the mean of its divisors is an integer number (25444188).

Almost surely, 2^678508320 is an apocalyptic number.

678508320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678508320 is an abundant number, since it is smaller than the sum of its proper divisors (1764133728).

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

678508320 is a wasteful number, since it uses less digits than its factorization.

678508320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201962 (or 201954 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 678508320 is about 26048.1922597327. The cubic root of 678508320 is about 878.7224575164.

The spelling of 678508320 in words is "six hundred seventy-eight million, five hundred eight thousand, three hundred twenty".