71509628 has 12 divisors (see below), whose sum is σ = 125255592. Its totient is φ = 35722320.

The previous prime is 71509589. The next prime is 71509639. The reversal of 71509628 is 82690517.

It is a super-2 number, since 2×71509628² = 10227253793396768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71509591 and 71509600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2783 + ... + 12278.

It is an arithmetic number, because the mean of its divisors is an integer number (10437966).

Almost surely, 2^71509628 is an apocalyptic number.

It is an amenable number.

71509628 is a deficient number, since it is larger than the sum of its proper divisors (53745964).

71509628 is a wasteful number, since it uses less digits than its factorization.

71509628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16252 (or 16250 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 71509628 is about 8456.3365590544. The cubic root of 71509628 is about 415.0701541051.

The spelling of 71509628 in words is "seventy-one million, five hundred nine thousand, six hundred twenty-eight".