340240402 has 4 divisors (see below), whose sum is σ = 510360606. Its totient is φ = 170120200.

The previous prime is 340240399. The next prime is 340240423. The reversal of 340240402 is 204042043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204042043 = 10337 ⋅19739.

It can be written as a sum of positive squares in only one way, i.e., 329749281 + 10491121 = 18159^2 + 3239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 340240402.

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 as a sum of consecutive naturals, namely, 85060099 + ... + 85060102.

Almost surely, 2^340240402 is an apocalyptic number.

340240402 is a deficient number, since it is larger than the sum of its proper divisors (170120204).

340240402 is a wasteful number, since it uses less digits than its factorization.

340240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170120203.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 340240402 is about 18445.6065771771. The cubic root of 340240402 is about 698.1176652947.

Adding to 340240402 its reverse (204042043), we get a palindrome (544282445).

The spelling of 340240402 in words is "three hundred forty million, two hundred forty thousand, four hundred two".