3900406 has 8 divisors (see below), whose sum is σ = 5859360. Its totient is φ = 1947288.

The previous prime is 3900397. The next prime is 3900433. The reversal of 3900406 is 6040093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140 + ... + 3016.

It is an arithmetic number, because the mean of its divisors is an integer number (732420).

Almost surely, 2^3900406 is an apocalyptic number.

3900406 is a deficient number, since it is larger than the sum of its proper divisors (1958954).

3900406 is a wasteful number, since it uses less digits than its factorization.

3900406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 3900406 is about 1974.9445561838. The cubic root of 3900406 is about 157.4115535995.

Adding to 3900406 its reverse (6040093), we get a palindrome (9940499).

The spelling of 3900406 in words is "three million, nine hundred thousand, four hundred six".