4085478 has 20 divisors (see below), whose sum is σ = 9154860. Its totient is φ = 1361772.

The previous prime is 4085453. The next prime is 4085489. The reversal of 4085478 is 8745804.

It is a super-2 number, since 2×4085478² = 33382260976968, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4² + 0 + 8⁵ + 5⁹ + 4² + 7⁴ + 8⁷ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12448 + ... + 12771.

It is an arithmetic number, because the mean of its divisors is an integer number (457743).

Almost surely, 2^4085478 is an apocalyptic number.

4085478 is an abundant number, since it is smaller than the sum of its proper divisors (5069382).

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

4085478 is a wasteful number, since it uses less digits than its factorization.

4085478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25233 (or 25224 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 4085478 is about 2021.2565398781. The cubic root of 4085478 is about 159.8628773088.

It can be divided in two parts, 408 and 5478, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 4085478 in words is "four million, eighty-five thousand, four hundred seventy-eight".