2443905 has 32 divisors (see below), whose sum is σ = 4456320. Its totient is φ = 1270080.

The previous prime is 2443901. The next prime is 2443927. The reversal of 2443905 is 5093442.

It is not a de Polignac number, because 2443905 - 2² = 2443901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2¹⁹ + 4⁶ + 4⁹ + 3¹³ + 9⁵ + 0 + 5 .

2443905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2443901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5595 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (139260).

2^2443905 is an apocalyptic number.

It is an amenable number.

2443905 is a deficient number, since it is larger than the sum of its proper divisors (2012415).

2443905 is a wasteful number, since it uses less digits than its factorization.

2443905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2443905 is about 1563.2993955094. The cubic root of 2443905 is about 134.6980907562.

The spelling of 2443905 in words is "two million, four hundred forty-three thousand, nine hundred five".