340389819 has 54 divisors (see below), whose sum is σ = 628768140. Its totient is φ = 176798160.

The previous prime is 340389779. The next prime is 340389823. The reversal of 340389819 is 918983043.

It is not a de Polignac number, because 340389819 - 2⁸ = 340389563 is a prime.

It is a super-3 number, since 3×340389819³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (340389869) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 50172 + ... + 56550.

Almost surely, 2^340389819 is an apocalyptic number.

340389819 is a deficient number, since it is larger than the sum of its proper divisors (288378321).

340389819 is a wasteful number, since it uses less digits than its factorization.

340389819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421 (or 6400 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 340389819 is about 18449.6563382628. The cubic root of 340389819 is about 698.2198434222.

The spelling of 340389819 in words is "three hundred forty million, three hundred eighty-nine thousand, eight hundred nineteen".