7081644 has 12 divisors (see below), whose sum is σ = 16523864. Its totient is φ = 2360544.

The previous prime is 7081637. The next prime is 7081649. The reversal of 7081644 is 4461807.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7081649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295057 + ... + 295080.

Almost surely, 2^7081644 is an apocalyptic number.

It is an amenable number.

7081644 is an abundant number, since it is smaller than the sum of its proper divisors (9442220).

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

7081644 is a wasteful number, since it uses less digits than its factorization.

7081644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590144 (or 590142 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 7081644 is about 2661.1358477162. The cubic root of 7081644 is about 192.0339566678.

The spelling of 7081644 in words is "seven million, eighty-one thousand, six hundred forty-four".