71648028 has 18 divisors (see below), whose sum is σ = 181110384. Its totient is φ = 23882664.

The previous prime is 71647999. The next prime is 71648029. The reversal of 71648028 is 82084617.

71648028 is a `hidden beast` number, since 7 + 1 + 648 + 0 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1990223 = 71648028 / (7 + 1 + 6 + 4 + 8 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 71647983 and 71648001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71648029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 995076 + ... + 995147.

It is an arithmetic number, because the mean of its divisors is an integer number (10061688).

Almost surely, 2^71648028 is an apocalyptic number.

It is an amenable number.

71648028 is an abundant number, since it is smaller than the sum of its proper divisors (109462356).

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

71648028 is a wasteful number, since it uses less digits than its factorization.

71648028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990233 (or 1990228 counting only the distinct ones).

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

The square root of 71648028 is about 8464.5158160405. The cubic root of 71648028 is about 415.3377576457.

The spelling of 71648028 in words is "seventy-one million, six hundred forty-eight thousand, twenty-eight".