71578628 has 48 divisors (see below), whose sum is σ = 142775808. Its totient is φ = 31104000.

The previous prime is 71578621. The next prime is 71578631. The reversal of 71578628 is 82687517.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (71578621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132038 + ... + 132578.

It is an arithmetic number, because the mean of its divisors is an integer number (2974496).

Almost surely, 2^71578628 is an apocalyptic number.

It is an amenable number.

71578628 is a deficient number, since it is larger than the sum of its proper divisors (71197180).

71578628 is a wasteful number, since it uses less digits than its factorization.

71578628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 71578628 is about 8460.4153562340. The cubic root of 71578628 is about 415.2036122831.

Subtracting 71578628 from its reverse (82687517), we obtain a square (11108889 = 3333²).

The spelling of 71578628 in words is "seventy-one million, five hundred seventy-eight thousand, six hundred twenty-eight".