340203440 has 40 divisors (see below), whose sum is σ = 804390480. Its totient is φ = 133773056.

The previous prime is 340203427. The next prime is 340203443. The reversal of 340203440 is 44302043.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (340203443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31319 + ... + 40758.

It is an arithmetic number, because the mean of its divisors is an integer number (20109762).

Almost surely, 2^340203440 is an apocalyptic number.

It is an amenable number.

340203440 is an abundant number, since it is smaller than the sum of its proper divisors (464187040).

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

340203440 is a wasteful number, since it uses less digits than its factorization.

340203440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72149 (or 72143 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 340203440 is about 18444.6046311652. The cubic root of 340203440 is about 698.0923843860.

Adding to 340203440 its reverse (44302043), we get a palindrome (384505483).

The spelling of 340203440 in words is "three hundred forty million, two hundred three thousand, four hundred forty".