4078845 has 12 divisors (see below), whose sum is σ = 7070076. Its totient is φ = 2175360.

The previous prime is 4078831. The next prime is 4078871. The reversal of 4078845 is 5488704.

It can be written as a sum of positive squares in 2 ways, for example, as 2595321 + 1483524 = 1611^2 + 1218^2 .

It is not a de Polignac number, because 4078845 - 2⁴ = 4078829 is a prime.

4078845 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45276 + ... + 45365.

It is an arithmetic number, because the mean of its divisors is an integer number (589173).

Almost surely, 2^4078845 is an apocalyptic number.

4078845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4078845 is a deficient number, since it is larger than the sum of its proper divisors (2991231).

4078845 is a wasteful number, since it uses less digits than its factorization.

4078845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90652 (or 90649 counting only the distinct ones).

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

The square root of 4078845 is about 2019.6150623324. The cubic root of 4078845 is about 159.7763150314.

The spelling of 4078845 in words is "four million, seventy-eight thousand, eight hundred forty-five".