678332928 has 320 divisors, whose sum is σ = 2331850752. Its totient is φ = 170311680.

The previous prime is 678332923. The next prime is 678332933. The reversal of 678332928 is 829233876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678332923) and next prime (678332933).

It is a super-2 number, since 2×678332928² = 920271122418106368, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678332923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3214743 + ... + 3214953.

Almost surely, 2^678332928 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 678332928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165925376).

678332928 is an abundant number, since it is smaller than the sum of its proper divisors (1653517824).

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

678332928 is a wasteful number, since it uses less digits than its factorization.

678332928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 259 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 678332928 is about 26044.8253593684. The cubic root of 678332928 is about 878.6467354427.

The spelling of 678332928 in words is "six hundred seventy-eight million, three hundred thirty-two thousand, nine hundred twenty-eight".