340309403 has 24 divisors (see below), whose sum is σ = 420722400. Its totient is φ = 269305344.

The previous prime is 340309397. The next prime is 340309441. The reversal of 340309403 is 304903043.

It is not a de Polignac number, because 340309403 - 2²⁶ = 273200539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340306403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105803 + ... + 108971.

It is an arithmetic number, because the mean of its divisors is an integer number (17530100).

Almost surely, 2^340309403 is an apocalyptic number.

340309403 is a deficient number, since it is larger than the sum of its proper divisors (80412997).

340309403 is a wasteful number, since it uses less digits than its factorization.

340309403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3228 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 340309403 is about 18447.4768735456. The cubic root of 340309403 is about 698.1648550275.

The spelling of 340309403 in words is "three hundred forty million, three hundred nine thousand, four hundred three".