678839040 has 324 divisors, whose sum is σ = 2586943632. Its totient is φ = 164229120.

The previous prime is 678839039. The next prime is 678839041. The reversal of 678839040 is 40938876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678839039) and next prime (678839041).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (678839041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1393677 + ... + 1394163.

Almost surely, 2^678839040 is an apocalyptic number.

678839040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678839040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293471816).

678839040 is an abundant number, since it is smaller than the sum of its proper divisors (1908104592).

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

678839040 is a wasteful number, since it uses less digits than its factorization.

678839040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 678839040 is about 26054.5397195959. The cubic root of 678839040 is about 878.8652039296.

The spelling of 678839040 in words is "six hundred seventy-eight million, eight hundred thirty-nine thousand, forty".