3506778 has 48 divisors (see below), whose sum is σ = 8424000. Its totient is φ = 1045440.

The previous prime is 3506753. The next prime is 3506801. The reversal of 3506778 is 8776053.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17523 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (175500).

Almost surely, 2^3506778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3506778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4212000).

3506778 is an abundant number, since it is smaller than the sum of its proper divisors (4917222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3506778 is a wasteful number, since it uses less digits than its factorization.

3506778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 3506778 is about 1872.6393139096. The cubic root of 3506778 is about 151.9273949183.

The spelling of 3506778 in words is "three million, five hundred six thousand, seven hundred seventy-eight".