71517428 has 12 divisors (see below), whose sum is σ = 128066400. Its totient is φ = 34927032.

The previous prime is 71517427. The next prime is 71517431. The reversal of 71517428 is 82471517.

It is a super-2 number, since 2×71517428² = 10229485015470368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71517427) 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 3 ways as a sum of consecutive naturals, for example, 207728 + ... + 208071.

It is an arithmetic number, because the mean of its divisors is an integer number (10672200).

Almost surely, 2^71517428 is an apocalyptic number.

It is an amenable number.

71517428 is a deficient number, since it is larger than the sum of its proper divisors (56548972).

71517428 is a wasteful number, since it uses less digits than its factorization.

71517428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415846 (or 415844 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 71517428 is about 8456.7977390972. The cubic root of 71517428 is about 415.0852449844.

The spelling of 71517428 in words is "seventy-one million, five hundred seventeen thousand, four hundred twenty-eight".