678996810 has 64 divisors (see below), whose sum is σ = 1813276800. Its totient is φ = 180804096.

The previous prime is 678996793. The next prime is 678996821. The reversal of 678996810 is 18699876.

It is a super-2 number, since 2×678996810² = 922073335980352200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249477 + ... + 252183.

It is an arithmetic number, because the mean of its divisors is an integer number (28332450).

Almost surely, 2^678996810 is an apocalyptic number.

678996810 is an abundant number, since it is smaller than the sum of its proper divisors (1134279990).

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

678996810 is a wasteful number, since it uses less digits than its factorization.

678996810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652 (or 3646 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 678996810 is about 26057.5672310367. The cubic root of 678996810 is about 878.9332847826.

The spelling of 678996810 in words is "six hundred seventy-eight million, nine hundred ninety-six thousand, eight hundred ten".