7981144 has 16 divisors (see below), whose sum is σ = 15313320. Its totient is φ = 3897600.

The previous prime is 7981139. The next prime is 7981147. The reversal of 7981144 is 4411897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981147) 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, 11257 + ... + 11944.

Almost surely, 2^7981144 is an apocalyptic number.

It is an amenable number.

7981144 is a deficient number, since it is larger than the sum of its proper divisors (7332176).

7981144 is a wasteful number, since it uses less digits than its factorization.

7981144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23250 (or 23246 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 7981144 is about 2825.0918569137. The cubic root of 7981144 is about 199.8427430503.

The spelling of 7981144 in words is "seven million, nine hundred eighty-one thousand, one hundred forty-four".