340404405 has 16 divisors (see below), whose sum is σ = 594160704. Its totient is φ = 165044480.

The previous prime is 340404367. The next prime is 340404431. The reversal of 340404405 is 504404043.

It is not a de Polignac number, because 340404405 - 2⁶ = 340404341 is a prime.

It is a super-3 number, since 3×340404405³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1031364 + ... + 1031693.

It is an arithmetic number, because the mean of its divisors is an integer number (37135044).

Almost surely, 2^340404405 is an apocalyptic number.

It is an amenable number.

340404405 is a deficient number, since it is larger than the sum of its proper divisors (253756299).

340404405 is a wasteful number, since it uses less digits than its factorization.

340404405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063076.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 340404405 is about 18450.0516259440. The cubic root of 340404405 is about 698.2298163891.

Adding to 340404405 its reverse (504404043), we get a palindrome (844808448).

The spelling of 340404405 in words is "three hundred forty million, four hundred four thousand, four hundred five".