678505400 has 48 divisors (see below), whose sum is σ = 1579482240. Its totient is φ = 271065600.

The previous prime is 678505391. The next prime is 678505403. The reversal of 678505400 is 4505876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678505403) 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, 215840 + ... + 218960.

It is an arithmetic number, because the mean of its divisors is an integer number (32905880).

Almost surely, 2^678505400 is an apocalyptic number.

It is an amenable number.

678505400 is an abundant number, since it is smaller than the sum of its proper divisors (900976840).

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

678505400 is a wasteful number, since it uses less digits than its factorization.

678505400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224 (or 4215 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 678505400 is about 26048.1362097176. The cubic root of 678505400 is about 878.7211969702.

The spelling of 678505400 in words is "six hundred seventy-eight million, five hundred five thousand, four hundred".