7648281 has 12 divisors (see below), whose sum is σ = 11305008. Its totient is φ = 4980024.

The previous prime is 7648261. The next prime is 7648309. The reversal of 7648281 is 1828467.

7648281 is a `hidden beast` number, since 7 + 648 + 2 + 8 + 1 = 666.

It is not a de Polignac number, because 7648281 - 2⁶ = 7648217 is a prime.

It is a super-2 number, since 2×7648281² = 116992404509922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7648211) 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 11 ways as a sum of consecutive naturals, for example, 9495 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (942084).

Almost surely, 2^7648281 is an apocalyptic number.

It is an amenable number.

7648281 is a deficient number, since it is larger than the sum of its proper divisors (3656727).

7648281 is a wasteful number, since it uses less digits than its factorization.

7648281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19812 (or 19809 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 7648281 is about 2765.5525668481. The cubic root of 7648281 is about 197.0249738581.

It can be divided in two parts, 764 and 8281, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 7648281 in words is "seven million, six hundred forty-eight thousand, two hundred eighty-one".