340379640 has 96 divisors (see below), whose sum is σ = 1129826880. Its totient is φ = 88832256.

The previous prime is 340379639. The next prime is 340379647. The reversal of 340379640 is 46973043.

340379640 is a `hidden beast` number, since 3 + 4 + 0 + 3 + 7 + 9 + 640 = 666.

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 = 340379595 and 340379604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340379647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6862 + ... + 26978.

It is an arithmetic number, because the mean of its divisors is an integer number (11769030).

Almost surely, 2^340379640 is an apocalyptic number.

340379640 is a gapful number since it is divisible by the number (30) 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 340379640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564913440).

340379640 is an abundant number, since it is smaller than the sum of its proper divisors (789447240).

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

340379640 is a wasteful number, since it uses less digits than its factorization.

340379640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20181 (or 20174 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 340379640 is about 18449.3804774036. The cubic root of 340379640 is about 698.2128835091.

The spelling of 340379640 in words is "three hundred forty million, three hundred seventy-nine thousand, six hundred forty".