340023440 has 20 divisors (see below), whose sum is σ = 790554684. Its totient is φ = 136009344.

The previous prime is 340023433. The next prime is 340023493. The reversal of 340023440 is 44320043.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 252937216 + 87086224 = 15904^2 + 9332^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125067 + ... + 2125226.

Almost surely, 2^340023440 is an apocalyptic number.

It is an amenable number.

340023440 is an abundant number, since it is smaller than the sum of its proper divisors (450531244).

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

340023440 is a wasteful number, since it uses less digits than its factorization.

340023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250306 (or 4250300 counting only the distinct ones).

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

The square root of 340023440 is about 18439.7245098727. The cubic root of 340023440 is about 697.9692435607.

Adding to 340023440 its reverse (44320043), we get a palindrome (384343483).

The spelling of 340023440 in words is "three hundred forty million, twenty-three thousand, four hundred forty".