3521778 has 32 divisors (see below), whose sum is σ = 7659456. Its totient is φ = 1073088.

The previous prime is 3521767. The next prime is 3521803. The reversal of 3521778 is 8771253.

It is a Curzon 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, 12576 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (239358).

Almost surely, 2^3521778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3829728).

3521778 is an abundant number, since it is smaller than the sum of its proper divisors (4137678).

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

3521778 is a wasteful number, since it uses less digits than its factorization.

3521778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

The product of its digits is 11760, while the sum is 33.

The square root of 3521778 is about 1876.6400827010. The cubic root of 3521778 is about 152.1437064279.

The spelling of 3521778 in words is "three million, five hundred twenty-one thousand, seven hundred seventy-eight".