2439405 has 24 divisors (see below), whose sum is σ = 4268160. Its totient is φ = 1288800.

The previous prime is 2439389. The next prime is 2439407. The reversal of 2439405 is 5049342.

It is not a de Polignac number, because 2439405 - 2⁴ = 2439389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6616 + ... + 6974.

It is an arithmetic number, because the mean of its divisors is an integer number (177840).

2^2439405 is an apocalyptic number.

It is an amenable number.

2439405 is a deficient number, since it is larger than the sum of its proper divisors (1828755).

2439405 is a wasteful number, since it uses less digits than its factorization.

2439405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 518 counting only the distinct ones).

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

The square root of 2439405 is about 1561.8594687103. The cubic root of 2439405 is about 134.6153660701.

The spelling of 2439405 in words is "two million, four hundred thirty-nine thousand, four hundred five".