2923405 has 16 divisors (see below), whose sum is σ = 3754944. Its totient is φ = 2177280.

The previous prime is 2923387. The next prime is 2923409. The reversal of 2923405 is 5043292.

It is a happy number.

It is not a de Polignac number, because 2923405 - 2⁹ = 2922893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2923405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2923409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13750 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (234684).

2^2923405 is an apocalyptic number.

It is an amenable number.

2923405 is a deficient number, since it is larger than the sum of its proper divisors (831539).

2923405 is a wasteful number, since it uses less digits than its factorization.

2923405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2923405 is about 1709.7967715492. The cubic root of 2923405 is about 142.9869256307.

Adding to 2923405 its reverse (5043292), we get a palindrome (7966697).

The spelling of 2923405 in words is "two million, nine hundred twenty-three thousand, four hundred five".