340403511 has 8 divisors (see below), whose sum is σ = 518710144. Its totient is φ = 194516280.

The previous prime is 340403507. The next prime is 340403521. The reversal of 340403511 is 115304043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 340403511 - 2² = 340403507 is a prime.

It is a super-2 number, since 2×340403511² = 231749100602254242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 16209691 = 340403511 / (3 + 4 + 0 + 4 + 0 + 3 + 5 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340403521) 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, 8104825 + ... + 8104866.

It is an arithmetic number, because the mean of its divisors is an integer number (64838768).

Almost surely, 2^340403511 is an apocalyptic number.

340403511 is a deficient number, since it is larger than the sum of its proper divisors (178306633).

340403511 is a wasteful number, since it uses less digits than its factorization.

340403511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16209701.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 340403511 is about 18450.0273983536. The cubic root of 340403511 is about 698.2292051377.

Adding to 340403511 its reverse (115304043), we get a palindrome (455707554).

The spelling of 340403511 in words is "three hundred forty million, four hundred three thousand, five hundred eleven".