678536544 has 48 divisors (see below), whose sum is σ = 2035611648. Its totient is φ = 193867392.

The previous prime is 678536527. The next prime is 678536549. The reversal of 678536544 is 445635876.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a junction number, because it is equal to n+sod(n) for n = 678536493 and 678536502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678536549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504192 + ... + 505535.

It is an arithmetic number, because the mean of its divisors is an integer number (42408576).

Almost surely, 2^678536544 is an apocalyptic number.

It is an amenable number.

678536544 is an abundant number, since it is smaller than the sum of its proper divisors (1357075104).

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

678536544 is a wasteful number, since it uses less digits than its factorization.

678536544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009747 (or 1009739 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The square root of 678536544 is about 26048.7340191419. The cubic root of 678536544 is about 878.7346414587.

The spelling of 678536544 in words is "six hundred seventy-eight million, five hundred thirty-six thousand, five hundred forty-four".