678248256 has 224 divisors, whose sum is σ = 2155675648. Its totient is φ = 184135680.

The previous prime is 678248243. The next prime is 678248267. The reversal of 678248256 is 652842876.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3041361 + ... + 3041583.

It is an arithmetic number, because the mean of its divisors is an integer number (9623552).

Almost surely, 2^678248256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678248256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1077837824).

678248256 is an abundant number, since it is smaller than the sum of its proper divisors (1477427392).

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

678248256 is a wasteful number, since it uses less digits than its factorization.

678248256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 339 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 678248256 is about 26043.1998034036. The cubic root of 678248256 is about 878.6101752871.

The spelling of 678248256 in words is "six hundred seventy-eight million, two hundred forty-eight thousand, two hundred fifty-six".