343402440 has 64 divisors (see below), whose sum is σ = 1034026560. Its totient is φ = 91234560.

The previous prime is 343402421. The next prime is 343402453. The reversal of 343402440 is 44204343.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 343402440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28075 + ... + 38405.

It is an arithmetic number, because the mean of its divisors is an integer number (16156665).

Almost surely, 2^343402440 is an apocalyptic number.

343402440 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 343402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517013280).

343402440 is an abundant number, since it is smaller than the sum of its proper divisors (690624120).

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

343402440 is a wasteful number, since it uses less digits than its factorization.

343402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10622 (or 10618 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 343402440 is about 18531.1208511520. The cubic root of 343402440 is about 700.2736617068.

Adding to 343402440 its reverse (44204343), we get a palindrome (387606783).

The spelling of 343402440 in words is "three hundred forty-three million, four hundred two thousand, four hundred forty".