71616986 has 32 divisors (see below), whose sum is σ = 128874240. Its totient is φ = 29183616.

The previous prime is 71616967. The next prime is 71616991. The reversal of 71616986 is 68961617.

71616986 = T₂₄₈₄ + T₂₄₈₅ + ... + T₂₅₀₆.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62870 + ... + 63998.

It is an arithmetic number, because the mean of its divisors is an integer number (4027320).

Almost surely, 2^71616986 is an apocalyptic number.

71616986 is a deficient number, since it is larger than the sum of its proper divisors (57257254).

71616986 is a wasteful number, since it uses less digits than its factorization.

71616986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its digits is 108864, while the sum is 44.

The square root of 71616986 is about 8462.6819625932. The cubic root of 71616986 is about 415.2777663360.

The spelling of 71616986 in words is "seventy-one million, six hundred sixteen thousand, nine hundred eighty-six".