1856240406 has 24 divisors (see below), whose sum is σ = 4072766880. Its totient is φ = 610914096.

The previous prime is 1856240357. The next prime is 1856240411. The reversal of 1856240406 is 6040426581.

1856240406 is a `hidden beast` number, since 1 + 8 + 5 + 6 + 240 + 406 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651265 + ... + 654108.

It is an arithmetic number, because the mean of its divisors is an integer number (169698620).

Almost surely, 2^1856240406 is an apocalyptic number.

1856240406 is an abundant number, since it is smaller than the sum of its proper divisors (2216526474).

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

1856240406 is a wasteful number, since it uses less digits than its factorization.

1856240406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305460 (or 1305457 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1856240406 is about 43084.1085088226. The cubic root of 1856240406 is about 1228.9797885725.

Adding to 1856240406 its reverse (6040426581), we get a palindrome (7896666987).

The spelling of 1856240406 in words is "one billion, eight hundred fifty-six million, two hundred forty thousand, four hundred six".