679818240 has 132 divisors (see below), whose sum is σ = 2355712164. Its totient is φ = 181272576.

The previous prime is 679818239. The next prime is 679818241. The reversal of 679818240 is 42818976.

It is an interprime number because it is at equal distance from previous prime (679818239) and next prime (679818241).

It can be written as a sum of positive squares in 2 ways, for example, as 288728064 + 391090176 = 16992^2 + 19776^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679818241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38704 + ... + 53456.

Almost surely, 2^679818240 is an apocalyptic number.

679818240 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 679818240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177856082).

679818240 is an abundant number, since it is smaller than the sum of its proper divisors (1675893924).

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

679818240 is a wasteful number, since it uses less digits than its factorization.

679818240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784 (or 14763 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 679818240 is about 26073.3242989842. The cubic root of 679818240 is about 879.2875776693.

The spelling of 679818240 in words is "six hundred seventy-nine million, eight hundred eighteen thousand, two hundred forty".