71425728 has 84 divisors (see below), whose sum is σ = 223360488. Its totient is φ = 21642240.

The previous prime is 71425727. The next prime is 71425747. The reversal of 71425728 is 82752417.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 71425692 and 71425701.

It is not an unprimeable number, because it can be changed into a prime (71425723) 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, 700 + ... + 11972.

Almost surely, 2^71425728 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 71425728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111680244).

71425728 is an abundant number, since it is smaller than the sum of its proper divisors (151934760).

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

71425728 is a wasteful number, since it uses less digits than its factorization.

71425728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11302 (or 11289 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 71425728 is about 8451.3743261082. The cubic root of 71425728 is about 414.9077609876.

The spelling of 71425728 in words is "seventy-one million, four hundred twenty-five thousand, seven hundred twenty-eight".