7981056 has 72 divisors (see below), whose sum is σ = 23103990. Its totient is φ = 2654208.

The previous prime is 7981049. The next prime is 7981067. The reversal of 7981056 is 6501897.

7981056 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7750656 + 230400 = 2784^2 + 480^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 7981056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18216 + ... + 18648.

Almost surely, 2^7981056 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 7981056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11551995).

7981056 is an abundant number, since it is smaller than the sum of its proper divisors (15122934).

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

7981056 is a wasteful number, since it uses less digits than its factorization.

7981056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 7981056 is about 2825.0762821559. The cubic root of 7981056 is about 199.8420085597.

The spelling of 7981056 in words is "seven million, nine hundred eighty-one thousand, fifty-six".