71206728 has 32 divisors (see below), whose sum is σ = 178676160. Its totient is φ = 23647680.

The previous prime is 71206711. The next prime is 71206831. The reversal of 71206728 is 82760217.

It is a super-2 number, since 2×71206728² = 10140796224931968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293 + ... + 12003.

It is an arithmetic number, because the mean of its divisors is an integer number (5583630).

Almost surely, 2^71206728 is an apocalyptic number.

It is an amenable number.

71206728 is an abundant number, since it is smaller than the sum of its proper divisors (107469432).

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

71206728 is a wasteful number, since it uses less digits than its factorization.

71206728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997 (or 10993 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 71206728 is about 8438.4079067085. The cubic root of 71206728 is about 414.4832742364.

The spelling of 71206728 in words is "seventy-one million, two hundred six thousand, seven hundred twenty-eight".