71965916 has 24 divisors (see below), whose sum is σ = 137610480. Its totient is φ = 32659200.

The previous prime is 71965903. The next prime is 71965931. The reversal of 71965916 is 61956917.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

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, 43586 + ... + 45206.

It is an arithmetic number, because the mean of its divisors is an integer number (5733770).

Almost surely, 2^71965916 is an apocalyptic number.

71965916 is the 4535-th centered heptagonal number.

It is an amenable number.

71965916 is a deficient number, since it is larger than the sum of its proper divisors (65644564).

71965916 is a wasteful number, since it uses less digits than its factorization.

71965916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2643 counting only the distinct ones).

The product of its digits is 102060, while the sum is 44.

The square root of 71965916 is about 8483.2727175307. The cubic root of 71965916 is about 415.9511083443.

The spelling of 71965916 in words is "seventy-one million, nine hundred sixty-five thousand, nine hundred sixteen".