71684530 has 16 divisors (see below), whose sum is σ = 135823680. Its totient is φ = 27164592.

The previous prime is 71684497. The next prime is 71684579. The reversal of 71684530 is 3548617.

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, 188454 + ... + 188833.

It is an arithmetic number, because the mean of its divisors is an integer number (8488980).

Almost surely, 2^71684530 is an apocalyptic number.

71684530 is a deficient number, since it is larger than the sum of its proper divisors (64139150).

71684530 is a wasteful number, since it uses less digits than its factorization.

71684530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377313.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 71684530 is about 8466.6717191586. The cubic root of 71684530 is about 415.4082787072.

The spelling of 71684530 in words is "seventy-one million, six hundred eighty-four thousand, five hundred thirty".