2402406 has 32 divisors (see below), whose sum is σ = 5654880. Its totient is φ = 753408.

The previous prime is 2402401. The next prime is 2402431. The reversal of 2402406 is 6042042.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2402401) 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, 391 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (176715).

2^2402406 is an apocalyptic number.

2402406 is an abundant number, since it is smaller than the sum of its proper divisors (3252474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2402406 is a wasteful number, since it uses less digits than its factorization.

2402406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645 (or 2639 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2402406 is about 1549.9696771227. The cubic root of 2402406 is about 133.9313155095.

Adding to 2402406 its reverse (6042042), we get a palindrome (8444448).

The spelling of 2402406 in words is "two million, four hundred two thousand, four hundred six".