678499120 has 80 divisors (see below), whose sum is σ = 1788323040. Its totient is φ = 237330432.

The previous prime is 678499099. The next prime is 678499127. The reversal of 678499120 is 21994876.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×678499120² = 920722111681548800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678499127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2592 + ... + 36928.

It is an arithmetic number, because the mean of its divisors is an integer number (22354038).

Almost surely, 2^678499120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678499120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894161520).

678499120 is an abundant number, since it is smaller than the sum of its proper divisors (1109823920).

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

678499120 is a wasteful number, since it uses less digits than its factorization.

678499120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34382 (or 34376 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 678499120 is about 26048.0156633860. The cubic root of 678499120 is about 878.7184859202.

The spelling of 678499120 in words is "six hundred seventy-eight million, four hundred ninety-nine thousand, one hundred twenty".