3478778678 has 8 divisors (see below), whose sum is σ = 5226682368. Its totient is φ = 1736551224.

The previous prime is 3478778671. The next prime is 3478778707. The reversal of 3478778678 is 8768778743.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3478778671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417526 + ... + 1419977.

It is an arithmetic number, because the mean of its divisors is an integer number (653335296).

Almost surely, 2^3478778678 is an apocalyptic number.

3478778678 is a deficient number, since it is larger than the sum of its proper divisors (1747903690).

3478778678 is a wasteful number, since it uses less digits than its factorization.

3478778678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838118.

The product of its digits is 88510464, while the sum is 65.

The square root of 3478778678 is about 58981.1722331796. The cubic root of 3478778678 is about 1515.2196710807.

Adding to 3478778678 its sum of digits (65), we get a palindrome (3478778743).

The spelling of 3478778678 in words is "three billion, four hundred seventy-eight million, seven hundred seventy-eight thousand, six hundred seventy-eight".