3889405 has 16 divisors (see below), whose sum is σ = 5125680. Its totient is φ = 2815488.

The previous prime is 3889399. The next prime is 3889411. The reversal of 3889405 is 5049883.

It is an interprime number because it is at equal distance from previous prime (3889399) and next prime (3889411).

It can be written as a sum of positive squares in 8 ways, for example, as 580644 + 3308761 = 762^2 + 1819^2 .

It is not a de Polignac number, because 3889405 - 2³ = 3889397 is a prime.

It is a congruent 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, 2881 + ... + 4009.

It is an arithmetic number, because the mean of its divisors is an integer number (320355).

Almost surely, 2^3889405 is an apocalyptic number.

It is an amenable number.

3889405 is a deficient number, since it is larger than the sum of its proper divisors (1236275).

3889405 is a wasteful number, since it uses less digits than its factorization.

3889405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 3889405 is about 1972.1574480756. The cubic root of 3889405 is about 157.2634224293.

The spelling of 3889405 in words is "three million, eight hundred eighty-nine thousand, four hundred five".