6442776 has 48 divisors (see below), whose sum is σ = 17863560. Its totient is φ = 2096640.

The previous prime is 6442771. The next prime is 6442801. The reversal of 6442776 is 6772446.

6442776 is a `hidden beast` number, since 644 + 2 + 7 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6442776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2056 + ... + 4136.

Almost surely, 2^6442776 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 6442776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8931780).

6442776 is an abundant number, since it is smaller than the sum of its proper divisors (11420784).

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

6442776 is a wasteful number, since it uses less digits than its factorization.

6442776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136 (or 2129 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 6442776 is about 2538.2623977832. The cubic root of 6442776 is about 186.0762781142.

The spelling of 6442776 in words is "six million, four hundred forty-two thousand, seven hundred seventy-six".