1405844856 has 128 divisors (see below), whose sum is σ = 4248014400. Its totient is φ = 428198400.

The previous prime is 1405844819. The next prime is 1405844863. The reversal of 1405844856 is 6584485041.

It is a happy number.

1405844856 is a `hidden beast` number, since 14 + 0 + 584 + 4 + 8 + 56 = 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 31 ways as a sum of consecutive naturals, for example, 281130 + ... + 286086.

Almost surely, 2^1405844856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1405844856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124007200).

1405844856 is an abundant number, since it is smaller than the sum of its proper divisors (2842169544).

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

1405844856 is a wasteful number, since it uses less digits than its factorization.

1405844856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 5076 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 1405844856 is about 37494.5976908674. The cubic root of 1405844856 is about 1120.2435843499.

The spelling of 1405844856 in words is "one billion, four hundred five million, eight hundred forty-four thousand, eight hundred fifty-six".