678995340 has 48 divisors (see below), whose sum is σ = 1916178432. Its totient is φ = 179637696.

The previous prime is 678995333. The next prime is 678995341. The reversal of 678995340 is 43599876.

It is a super-2 number, since 2×678995340² = 922069343483431200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678995341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36934 + ... + 52173.

It is an arithmetic number, because the mean of its divisors is an integer number (39920384).

Almost surely, 2^678995340 is an apocalyptic number.

678995340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678995340 is an abundant number, since it is smaller than the sum of its proper divisors (1237183092).

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

678995340 is a wasteful number, since it uses less digits than its factorization.

678995340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89246 (or 89244 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 678995340 is about 26057.5390242440. The cubic root of 678995340 is about 878.9326504974.

The spelling of 678995340 in words is "six hundred seventy-eight million, nine hundred ninety-five thousand, three hundred forty".