678449088 has 112 divisors (see below), whose sum is σ = 2005644960. Its totient is φ = 224888832.

The previous prime is 678449087. The next prime is 678449153. The reversal of 678449088 is 880944876.

678449088 is a `hidden beast` number, since 6 + 78 + 4 + 490 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678449087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339420 + ... + 341412.

Almost surely, 2^678449088 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 678449088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002822480).

678449088 is an abundant number, since it is smaller than the sum of its proper divisors (1327195872).

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

678449088 is a wasteful number, since it uses less digits than its factorization.

678449088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2195 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 678449088 is about 26047.0552654230. The cubic root of 678449088 is about 878.6968867156.

The spelling of 678449088 in words is "six hundred seventy-eight million, four hundred forty-nine thousand, eighty-eight".