679011840 has 240 divisors, whose sum is σ = 2533619088. Its totient is φ = 167067648.

The previous prime is 679011821. The next prime is 679011847. The reversal of 679011840 is 48110976.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×679011840² = 922114157720371200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 679011795 and 679011804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679011847) 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 23 ways as a sum of consecutive naturals, for example, 298387 + ... + 300653.

Almost surely, 2^679011840 is an apocalyptic number.

679011840 is a gapful number since it is divisible by the number (60) 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 679011840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266809544).

679011840 is an abundant number, since it is smaller than the sum of its proper divisors (1854607248).

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

679011840 is a wasteful number, since it uses less digits than its factorization.

679011840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 679011840 is about 26057.8556293491. The cubic root of 679011840 is about 878.9397699726.

The spelling of 679011840 in words is "six hundred seventy-nine million, eleven thousand, eight hundred forty".