3405478 has 4 divisors (see below), whose sum is σ = 5108220. Its totient is φ = 1702738.

The previous prime is 3405473. The next prime is 3405509. The reversal of 3405478 is 8745043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8745043 = 1741 ⋅5023.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 851368 + ... + 851371.

It is an arithmetic number, because the mean of its divisors is an integer number (1277055).

Almost surely, 2^3405478 is an apocalyptic number.

3405478 is a deficient number, since it is larger than the sum of its proper divisors (1702742).

3405478 is a wasteful number, since it uses less digits than its factorization.

3405478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702741.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 3405478 is about 1845.3937249270. The cubic root of 3405478 is about 150.4501735330.

It can be divided in two parts, 3405 and 478, that added together give a palindrome (3883).

The spelling of 3405478 in words is "three million, four hundred five thousand, four hundred seventy-eight".