340397388 has 72 divisors (see below), whose sum is σ = 914397120. Its totient is φ = 106466400.

The previous prime is 340397363. The next prime is 340397399. The reversal of 340397388 is 883793043.

It is a happy number.

It is an unprimeable number.

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, 70863 + ... + 75513.

It is an arithmetic number, because the mean of its divisors is an integer number (12699960).

Almost surely, 2^340397388 is an apocalyptic number.

340397388 is a gapful number since it is divisible by the number (38) 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 340397388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457198560).

340397388 is an abundant number, since it is smaller than the sum of its proper divisors (573999732).

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

340397388 is a wasteful number, since it uses less digits than its factorization.

340397388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4787 (or 4782 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 340397388 is about 18449.8614628945. The cubic root of 340397388 is about 698.2250186522.

The spelling of 340397388 in words is "three hundred forty million, three hundred ninety-seven thousand, three hundred eighty-eight".