71028580 has 24 divisors (see below), whose sum is σ = 170468928. Its totient is φ = 24352608.

The previous prime is 71028557. The next prime is 71028589. The reversal of 71028580 is 8582017.

It is not an unprimeable number, because it can be changed into a prime (71028589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253534 + ... + 253813.

It is an arithmetic number, because the mean of its divisors is an integer number (7102872).

Almost surely, 2^71028580 is an apocalyptic number.

71028580 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71028580 is an abundant number, since it is smaller than the sum of its proper divisors (99440348).

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

71028580 is a wasteful number, since it uses less digits than its factorization.

71028580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507363 (or 507361 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 71028580 is about 8427.8455135343. The cubic root of 71028580 is about 414.1373283205.

The spelling of 71028580 in words is "seventy-one million, twenty-eight thousand, five hundred eighty".