678622464 has 216 divisors, whose sum is σ = 2135325920. Its totient is φ = 206032896.

The previous prime is 678622463. The next prime is 678622523. The reversal of 678622464 is 464226876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678622463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4163247 + ... + 4163409.

Almost surely, 2^678622464 is an apocalyptic number.

678622464 is a gapful number since it is divisible by the number (64) 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 678622464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067662960).

678622464 is an abundant number, since it is smaller than the sum of its proper divisors (1456703456).

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

678622464 is a wasteful number, since it uses less digits than its factorization.

678622464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 320 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 678622464 is about 26050.3831833622. The cubic root of 678622464 is about 878.7717299518.

The spelling of 678622464 in words is "six hundred seventy-eight million, six hundred twenty-two thousand, four hundred sixty-four".